To find the slope given two points, you need to subtract the two y values over the two x values (-5,-3) (9,-6) -5 will be x1, and -3 will be y1. 9 will be x2, and -6 will be y2. You then need to put the numbers in the correct place in the equation. y2-y1 -6-(-3) -9 -------- = -------- = ---- x2-x1 9-(-5) 14 Now that we have the slope (-9/14) you can use one of the coordinates to find the value of b. Let's use (9,-6). -6=-9/14(9)+b -6=-81/14+b +81/14 b=-3/14 Your final equation is y=-9/15x-3/14
