CPM Homework Help : PC Problem 7-16

Suppose that the point $A$ has coordinates $\left(r, s\right)$ , the point $B$ has coordinates $\left(t, u\right)$ and the line $y = mx + b$ goes through both points. Find the distance between $A$ and $B$ in terms of $r$ , $t$ and $m$ . Hint: First DRAW A PICTURE and then find the slope of the line using the points $A$ and $B$ .

Hint:

Increasing line on unscaled grid, labeled y = m x + b, passing through third, second, & first quadrants, 2 highlighted points on line in first quadrant labeled, as coordinates, left, (t, comma u), & (r, comma s).