First find the slope -8 + 2 / -15 + 24 = -6 / 9 = -2 / 3 is the slope. Now use subsitution with an order pair to find the y - intercept. -2 = -2/3(-24) + b, and you find that the y - intercept is -18 ( y - intercept is b). So to find the x - intercept you know that y has to be 0, and create 0 = -2/3x -18, and find that the x-intercept is -27. In order pair form x - intercept would look like (-27,0) and y-intercept would look like (0,-18). Hope this helps.