2.18: Linear law: $\ln y$ against $\ln x$

Variables $x$ and $y$ are connected by the relationship $y = Ax^{n}$, where $A$ and $n$ are constants. When $\ln y$ is plotted against $\ln x$ a straight line graph passing through the points $(0, 0.5)$ and $(3.2, 1.7)$ is obtained.