Answer:
Step-by-step explanation:
(1,1) (2,-2)
Y2 = -2 , y1 = 1 , x2 = 2 , x1 = 1
Slope m = (y2 - y1)/(x2 - x1)
m = (-2 - 1)/(2 - 1)
m = -3/1
m = -3
And the equation of line
y - y1 = m(x - x1)
y - 1 = -3(x - 1)
y - 1 = -3x + 3
y = -3x + 3 + 1
y = -3x + 4
