In this exercise, we will examine Ron-Jon's incorrect solution when he tried to find the of a line. Let's begin by writing the .
In the formula,
represents the slope, and
represent points that lie on the line. Let's find the slope by ourselves and compare our results to determine the mistake Ron-Jon made. To do so, we will substitute
Right away we can see Ron-Jon's error. The points were wrongly substituted into the formula. Basically, he calculated
run over rise
rise over run.
Let's continue and find the correct slope.
The correct slope is