Point-slope form: y - y₁ = m(x - x₁)
m is the slope, (x₁ , y₁) is your point
So your point-slope equation is:
m = -4 (x₁ , y₁) = (4 , -9)
y - y₁ = m(x - x₁)
y + 9 = -4(x - 4)
Answer: y + 9 = -4(x - 4)
(y-y1) = m(x-x1)
m is slope of a line (proportionality constant)
(x1, y1) is any point on a line
Hope this helps!!!
