Reading & interpreting graphs, charts & tables

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Find the **x-value**, go **up to the curve**, **across to the y-axis**, read the height — and write it **with its unit**.

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**Interpolate** = estimate a value **between** plotted points (safe). **Extrapolate** = predict a value **beyond** the data (a prediction — the trend may not hold).

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Take roughly the **midpoint** of the neighbouring readings, e.g. $y \approx \dfrac{30 + 42}{2} = 36$ (with the unit).

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**Direction first** (rises/falls), then the **change of pattern** (plateau or peak), each backed by **figures** from the graph.

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At least **one similarity AND one difference** between the series, each supported by a **value** from the data.

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A **reason** drawn from the trend — and you should flag it as a prediction (extrapolation), since the trend might change.

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A value with **no unit** scores nothing — always quote the **unit** read from the axis.