CAIE A-Level Biology A2 M 5 Graphs Data Transformation and Rates of Change Questions

Plot and interpret biological graphs, transform variables where appropriate and calculate rates of change from gradients or time-series data in Cambridge A Level Biology questions.

Exam points

Plot and interpret biological data, transform variables where appropriate and calculate rates of change from gradients or time-series graphs.

[Maximum number: 3]

The glomerular filtration rate (GFR) is the rate at which fluid filters from the blood in the glomerulus into the Bowman's capsule.

Fig. 6.2 shows the mean GFR values for healthy males and females of different age groups.

Use Fig. 6.2 to calculate the yearly rate of decrease in mean GFR from the 20-29 age group to the 80-89 age group for females.

Show your working.
Give your answer to one decimal place and include units.
answer

$\frac{118-52}{60} \text { or } \frac{118-52}{69} \text { or } \frac{118-52}{51} \text {; }$

1.1 or 1.0 or 1.3 ;

$\mathrm{cm}^{3} \mathrm{~min}^{-1} \mathrm{y}^{-1} ; \mathrm{A} \mathrm{cm}^{3} \mathrm{~min}^{-1} /$ year

A year(s) ${ }^{-1}$

R yr or yrs or mins

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CAIE A-Level Biology A2 M 5 Graphs Data Transformation and Rates of Change Questions question 1