Question 158317
(4,7), (-2,2)
Y=mX+b
m=(2+7)/(-2-4)
m=9/-6
m=-1.5
7=-1.5*4+b
7=-6+b
b=7+6
b=13 FOR THE Y INTERCEPT.
Y=-1.5X+13 
{{{ graph( 300, 200, -6, 15, -10, 15, -1.5x +13) }}} (graph 300x200 pixels, x from -6 to 15, y from -10 to 15, -1.5x +13).