PTE Describe Image Bar Charts: Vocabulary for Rankings and Gaps

A bar chart can contain twelve categories, two colors, and a crowded value axis. You still have only 40 seconds to describe it in PTE Academic. The useful skill is not naming every bar. It is selecting a hierarchy: the overall pattern, the highest and lowest values, and one comparison that makes the pattern clear.

Pearson's current task page says you have 25 seconds to study the image and 40 seconds to answer. Its guidance asks you to focus on the main information. That makes vocabulary a selection tool. Words such as lead, trail, edge, on par with, by far, and a narrow gap tell the listener which relationships matter.

This lesson concentrates on categorical bar charts. For movement over time, use the separate guide to PTE Describe Image trends.

Start with the comparison basis

Consider this original practice chart:

The title says the figures are the percentage of student journeys. Before speaking, identify three things:

1. Unit: percentages, not numbers of students.
2. Comparison: modes within each campus and the same mode across campuses.
3. Salient pattern: bus leads at both campuses, but its advantage is much larger in the north.

Do not say the north campus has more bus passengers. The chart gives shares, and the campuses may have different student populations. The safe claim is that buses account for a larger share of journeys in the north.

Lead, rank, and trail

Use lead when a category has the highest displayed value:

Bus travel leads at both campuses, accounting for 48 percent in the north and 34 percent in the south.

Use rank first, second, or last when the order itself helps. A rank is relative; it does not tell the size of the gap.

At the south campus, bus ranks first, walking second, cycling third, and car travel last.

Use trail to compare a lower category with a stated higher one:

Walking trails bus use by six percentage points in the south.

The direction matters. If walking is 28 percent and bus use is 34 percent, walking trails bus use; bus use leads walking. Avoid walking trails by 28 percent, which confuses the category's value with the gap.

Edge, exceed, and outstrip: three sizes of lead

Edge works for a small advantage, often with out:

Cycling edges out walking in the north, 22 percent to 18 percent.

Exceed is neutral. It states that one value is higher without suggesting whether the difference is surprising:

The share for walking in the south exceeds the northern figure by 10 percentage points.

Outstrip suggests a clear or substantial lead:

In the north, bus use outstrips car use by 36 percentage points.

Do not use outstrip for every higher value. A 24-to-22 comparison is better described with slightly exceeds or edges out. Vocabulary should encode the chart, not dramatize it.

On par with and roughly comparable

Two bars do not need to be identical to form a useful pair. On par with often signals equality or a very similar level:

Cycling in the south is roughly on par with cycling in the north, at 24 and 22 percent respectively.

The adverb roughly protects the numerical distinction. Without it, on par may sound as if the values are equal. Comparable is also useful for values close enough to discuss together:

Car use is comparable across the two campuses.

Do not use similar to erase an important difference. Whether 34 and 48 percent are similar depends on the purpose of the chart; here, the 14-point gap is one of its central contrasts.

By far and marginally

By far intensifies a superlative when the visual lead is unmistakable:

Bus is by far the most common mode in the north.

It needs a real separation. In the south, bus is six points above walking, so simply the largest share is more measured.

Marginally marks a small difference:

Cycling is marginally more common in the south than in the north.

If exact values are visible, add them selectively. The number establishes what marginally means in this chart.

Percentage points are not percent

The difference between 48 percent and 34 percent is 14 percentage points. It is not a 14 percent decrease. Relative percentage change uses a different calculation and is usually unnecessary in a 40-second description.

Safe language includes:

• a gap of 14 percentage points
• 14 points higher
• 48 percent compared with 34 percent

If the chart shows raw counts, say students, responses, or whatever the unit names. Never add a percent sign because percentage language feels easier.

Build a selective response

A weak response reads the table behind the chart:

The north has bus 48, bicycle 22, walking 18, and car 12, while the south has bus 34, bicycle 24, walking 28, and car 14.

It is mostly accurate, but it gives no hierarchy.

A stronger response is:

The bar chart compares the percentage of student journeys made by four transport modes at two campuses. Bus travel leads in both locations and is by far the largest category in the north, at 48 percent. In the south, its 34-percent share exceeds walking by only six percentage points. Cycling and car use are broadly comparable across the campuses, whereas walking is notably more common in the south.

The response reports the unit, establishes the leader, contrasts the size of its lead, and groups the less variable categories. It does not infer why students travel differently.

A 25-second scan routine

During preparation, write a minimal note such as:

% journeys | bus leads both | N gap huge | S walk close | bike/car similar

First scan the title and unit. Next mark the maximum and minimum. Then look for a tie, a near-tie, or the largest cross-group difference. Finally choose two or three numbers that anchor those claims.

This is not a script. A different image may have no meaningful minimum or may make a middle cluster more important than the extremes. The routine helps you notice relationships; it does not predetermine your sentences.

Common mistakes

• Reading every bar. Selection is part of describing the main information.
• Calling any maximum an outlier. The largest value is not automatically unusual relative to the pattern.
• Using trend verbs for categories. If the horizontal axis lists cities rather than time, one bar does not rise into the next.
• Inventing causes. A higher cycling share does not prove better cycle lanes unless the image provides that information.
• Losing the unit. Forty-eight percent of journeys is not forty-eight journeys.
• Overstating a small gap. Reserve by far and outstrip for visibly substantial differences.

Worked selection drill: which relationships deserve airtime?

Consider another original chart showing the number of weekly bookings for four campus facilities:

Which three observations best organize a short description?

1. Study rooms rank first in both periods and are almost unchanged.
2. Evening use is exactly twice morning use for the sports hall.
3. Media-lab bookings are virtually on par.

The music rooms also show a clear difference, but a response does not need every valid comparison. A defensible alternative is to group the two facilities whose evening bookings are exactly double or nearly double their morning figures:

Study-room bookings lead in both periods, at just over 80, while media-lab use is also broadly stable at around 45; by contrast, evening demand is twice the morning level for the sports hall and nearly twice as high for music rooms.

Why is by contrast justified? The first pair is stable, whereas the second pair has much higher evening use. Why is nearly twice correct for music rooms? Fifty-four is slightly below twice 28, so twice would overstate the ratio. Nothing in the chart explains the evening differences, so a claim about student schedules would be speculation.

Now test the difference between level and gap. Study rooms have 84 morning bookings; that is the level. Their lead over the media lab in the morning is 40 bookings; that is the gap. Saying “study rooms lead by 84” would confuse the two unless the comparison category had zero bookings.

Self-check with deterministic answers

For the same chart, label each statement accurate or inaccurate.

1. “The sports hall rises from 36 morning bookings to 72 in the evening.”
2. “The media lab is on par across the two periods.”
3. “Study-room demand is by far higher in the morning than in the evening.”
4. “Evening music-room use exceeds morning use by 26 bookings.”

Answers: 1 is accurate because the columns provide two named periods in an ordered comparison. 2 is accurate as a rounded description of 44 and 45. 3 is inaccurate because 84 and 81 are close, not far apart. 4 is accurate because 54 minus 28 equals 26. These answers depend only on the displayed values; they do not require a theory about why people book facilities.

Quick check

A chart shows A at 52%, B at 50%, C at 27%, and D at 8%.

1. Best description of A versus B: A marginally edges out B.
2. Best description of B versus D: B outstrips D by 42 percentage points.
3. Safe statement about D: D ranks last. Do not say why.

Now describe this original set: online 41%, library 39%, classroom 15%, other 5%. Begin with the near-tie, then group the two smaller categories. Keep the response under 40 seconds and include no explanation for the preferences.

For broader task practice, visit the PTE Academic Vocabulary Practice hub and the Exam English hub. You can also compare language for IELTS Task 1 bar and pie charts while keeping each exam's task rules separate.

Sources

• PTE Academic Speaking & Writing test format — Pearson
• PTE Academic speaking test tips — Pearson

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