Find the equation of the line in slope-intercept form.
Let's look carefully at the graph and see if we can find any important information….
Ok, have you looked at it? You have, great! Then you noticed that the y-intercept is 1. We can also find the slope by counting the change in the vertical and horizontal directions between the two points shown (1 in the vertical and 3 in the horizontal). That gives a slope of 1/3.
Now, using that information we know these things:
b = 1 and m = 1/3
All we need to do is plug them into our equation, y = mx + b.