Question

Find the equation of the line passes through the points (-1,5) and (3,13)

Answer 1

y = 2x + 7

Explanation:

→ Find the gradient

`(13-5)/(3--1) =2`

→ Write into y = mx + c format

y = 2x + c

→ Substitute in x = -1 and y = 5

5 = -2 + c ∴ c = 7

→ Write into y = mx + c format

y = 2x + 7