Question

What is the equation of the graph below?

Answer 1

y = 3x + 1

Explanation:

You know the y intercept by looking where the line hits the y axis, which is at (0,1), so you know the "b" of the equation is 1. Then, you do rise over run. If you rise 3 and run 1, you get to another point, so I know the slope is 3/1 or 3.

Answer 2

y = 3x + b

3x is the slope

y = 3x + 1 because 1 is the y intercept

Explanation: