y= random Y-coordinate (not useful in this situation)
m= slope
x= random X coordinate (not useful in this situation)
b= y-intercept (the first point of the line that hits the y axis)
So first lets find the slope
sure we can use the slope formula between 2 points but I just did rise over run since this is an easy graph
Rise 5 and go Left 1 so the slope is -5/1 or -5 (negative due to the run going left instead of right plus the line is negative since its falling from left to right)
The y intercept is 8 becuase its the first point where the line crosses the Y axis
