We know that when there is a relation like x inversely proportional to y^2, the graph would be like this:
But in this question"Plot a graph showing variation of Coulomb force(F) versus $1/r^2$, where $r$ is distance between two charges of each pair of charges($1\,\mu C$, $2\,\mu C$) and ($1\,\mu C$, $-3\,\mu C$). Interpret the graphs obtained.".. The answer in my book is given in a strange way like this:
I don't think this is a wrong answer as I have checked it in many books. So, why did they do it like that (that graph in answer looks like x directly proportional to y)?