(4, y) (1, 9) M= -4 y=MX+B solve for y

Answer 1

-4 = (9-y)/(1-4)

-4 = (9-y)/(-3)

12 = 9 - y

3 = -y

-3 = y

So the line eats (4,-3) and (1,9)

y = -4x + b

9 = (-4)(1) + b

9 = -4 + b

b = 13

y = -4x + 13