Answer: y = 1x - 3
Step-by-step explanation:
1. The equation to find slope is shown by the following:
= slope (another term for slope is "m")
Choose two coordinates on the graph to solve this problem.
I chose (15,12) and (9,6), although any other set of points would have worked
At this point, you would plug the x and y coordinates in their respective places and solve:
=
= 1
Now we know the slope/m = 1
This is the equation so far: y = 1x+b
2: Now, we have to solve for b, or the y-intercept
To solve for b, we need to plug in an "(x,y)" coordinate into this equation:

Choose any coordinate from the graph. In this instance, i chose "(3,0)," but any other point would work.
(y-0) = 1(x-3) --> y = 1x - 3
The equation that represents the line is y = 1x - 3