Writing Linear Functions

We have been asked to explain and correct Ron-Jon's mistake when finding the slope. Let's see how he might have calculated in order to obtain $0.4.$ $0.4=\dfrac{2}{5}=\dfrac{\text{run}}{\text{rise}}$ This is incorrect as rise and run have been reversed. The slope should have been calculated by dividing the rise by the run. $m=\dfrac{\text{rise}}{\text{run}} = \dfrac{5}{2}=2.5$