Question

Write a simplified equation in point-slope form.

Line 2: contains (1,2) and (4, -7)

Answer 1

y = -3x + 5

Explanation:

(1, 2) and (4, -7)

(x₁, y₁) (x₂, y₂)

y₂ - y₁ -7 - 2 -9

m = ------------- = ------------- = -------- = -3

x₂ - x₁ 4 - 1 3

y - y₁ = m(x - x₁)

y - 2 = -3(x - 1)

y - 2 = -3x + 3

+2 +2

----------------------

y = -3x + 5

I hope this helps!