Question

Write an equation in point-slope form that describes the line with a slope of -3 that contains the point (1,2)

Answer 1

y - 2 = -3(x - 1)

Explanation:

The point-slope form of the equation that describes the line with a slope of m that contains the point (x₀, y₀) is: y - y₀ = m(x - x₀)

m = - 3

(1, 2) ⇒ x₀ = 1, y₀ = 2

Therefore:

y - 2 = -3(x - 1)