A-Level Edexcel Biology Rates from Linear Graphs

Review A-Level Edexcel Biology rates from linear graphs through the available evidence on calculating mean change over time with rate units.

Exam points

calculate mean rate of change from linear graph intervals with suitable units

[Maximum number: 1]

Glaciers are decreasing in height and retreating due to global warming. The diagram shows a retreating glacier.

Figure for Question A.3.5—Rates from linear graphs question 1 — Edexcel A-Level Biology A2

The graph shows the decrease in height of a glacier from 1980 to 2000.

Calculate the mean drop in height from 1980 to 2000. Give suitable units for your answer.

\{0.29 / 0.3\} metres per year
metres $\mathrm{yr}^{-1}$ $\mathrm{m} \mathrm{yr}^{-1}$
m per y
metres / year (1)

ACCEPT with or without - sign
DO NOT ACCEPT m per $\mathrm{yr}^{-1}$ $\mathrm{m} / \mathrm{yr}^{-1}$ $\mathrm{m}^{-1}$

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A.3.5—Rates from linear graphs question 1