Question

Find the equation of the line through the point (1,-1) with
slope 4?

Answer 1

4x - y - 5 = 0

Explanation:

Given:

Slope = m = 4

(x1,y1) = (1,-1)

Solution:

y - y1 = m (x - x1)

y - (-1) = 4 (x - 1)

y + 1 = 4x - 4

y = 4x - 4 - 1

y = 4x - 5

4x - y - 5 = 0