Solution — 2024 Question 9 Regression

Using GC, $$r=0.837∎$$

It means that there is moderately strong positive correlation between the average amount of exercise per week and the reduction in resting heart rate.

Using GC, the equation of the regression line of $y$ on $x$ is $$y=0.355x+2.10∎$$

$m=0.355$ means that, on average, when a user of the fitness app increases their average amount of exercise per week by 1 hour, this is correlated with a reduction of their resting heart rate by $0.355$ beats per minute $∎$