IELTS language bank: Task 1 Line Graphs

A line graph's whole describing challenge is continuous change over time, and that is a genuinely different task from comparing fixed categories or describing a static proportion: a candidate has to track a line's shape as it moves, choosing a verb that matches not just the direction but the speed and smoothness of that movement at each stage. The most common weakness in a Band 5-6 line graph report is a single verb — usually "increased" or "decreased" — repeated for every single change on the chart, regardless of whether that change was a sudden spike or a gentle multi-year drift. English has a genuinely large vocabulary for exactly this distinction, and using even three or four different movement verbs across one report, each one actually matched to what the line does at that point, is one of the fastest ways to lift Lexical Resource on this chart type specifically.

For upward movement at a steady, unremarkable pace: "rose," "increased," "climbed," and "grew" are the standard, neutral choices, appropriate whenever the line's slope is moderate and doesn't call for a more dramatic word. For upward movement that is fast or dramatic: "surged," "soared," "rocketed," "shot up," and "spiked" all imply a rapid, often short-lived rise — "spiked" specifically suggests a brief sharp rise that may not hold, useful for a single unusual peak rather than a sustained climb. For upward movement that is slow and gradual: "crept up," "edged up," "inched up," and "drifted upward" all signal a small, barely-perceptible rise over an extended period, the opposite end of the speed scale from "surged": "Enrolment crept up from 40,000 to 42,000 over the entire decade shown," a very different picture from "enrolment surged."

For downward movement, a matching three-speed range exists. Steady decline: "fell," "declined," "dropped," "decreased." Fast, dramatic decline: "plummeted," "plunged," "collapsed," "tumbled," "nosedived" — "collapsed" in particular implies a decline severe enough to suggest something closer to failure than ordinary fluctuation, so reserve it for genuinely steep, sudden falls rather than any decrease. Slow, gradual decline: "dipped slightly," "eased back," "tailed off," "tapered off" — "tapered off" specifically suits a decline that gets gentler as it continues, useful for a line that falls sharply at first and then gradually flattens rather than falling at a constant rate throughout.

For stability, "remained stable," "levelled off," "plateaued," "stayed constant," "held steady," and "stagnated" all describe a flat section of the line, though not interchangeably: "plateaued" and "levelled off" specifically suit a flat period following a rise or fall, implying the line arrived at that flatness rather than starting there, while "remained stable" and "stayed constant" work equally well for a line that was flat throughout. "Stagnated" carries a slightly negative connotation of an unwelcome lack of growth and suits contexts — wages, economic output — where continued growth was the expected or desirable pattern.