Question

What is the slope intercept form of the equation of the line passing through (1,2) and (3,10).

Answer 1

y = 4x - 2

Explanation:

slope = (10 - 2)/(3 - 1) = 8/2 = 4

Let the equation be y = 4x + b

Sub (1, 2) into it,

2 = 4*1 + b

so b = 2 - 4 = -2

The equation is y = 4x - 2