18. Statistics
iGCSE (2021 Edition)
18.14 Linear regression line (Extended)
Interactive practice questions
The equation $d=58-0.63h$d=58−0.63h represents the line of best fit relating the air humidity, $h$h, and the depth in metres, $d$d, of snow in an area.
a
Use the equation to determine the snow depth when the air humidity is $0.6$0.6.
b
Solve for $h$h, the level of air humidity you would expect to achieve a snow depth of $57.496$57.496 metres.
Easy
3min
The equation for the line of best fit is given by $P=161-2t$P=161−2t, where $t$t is time.
This relationship shows that over time, $P$P is:
Easy
< 1min
Given the following table showing the number of eggs lain versus the number of ducks.
Easy
5min
The table shows data on the number of kilograms of litter collected each week in a national park $x$x weeks after the park managers started an anti-littering campaign.
Medium
3min
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