A-Level Maths Edexcel (9MA0)

Use logarithmic graphs to estimate parameters in relationships of the form $y = ax^n$ and $y = kb^x$, given data for $x$ and $y$.

$y = ax^n$: Plot $\log{y}$ against $\log{x}$ and obtain a straight line where the intercept is $\log{a}$ and the gradient is $n$.

$y = kb^x$: Plot $\log{y}$ against $x$ and obtain a straight line where the intercept is $\log{k}$ and the gradient is $\log{b}$.