Question

Write an equation for the line that passes through (1, -1) and (0, -4)

Answer 1

Y = 3x - 4

Explanation:

find slope

(y2 - y1) / (x2 - x1)

(-4 + 1) / (0 - 1) = 3

plug one coordinate point into: y = mx + b

-1 = 3(1) + b

solve for b

b = -4

plug in numbers for m and b:

Y = 3x - 4