Question

Write a function in form y=mx+b for the line that passes through the points (2,5) and (6,21)

Answer 1

y=4x-3

Explanation:

First, you find the slope of both points, which is 4.

Plug in the slope to the equation, so it becomes y=4x+b. Substitute x and y with one of the points, I did (2,5)

5= 2(4)-b

5=8-b

b=3

so the answer is y=4x-3