The equation of the line is y = 2.5x - 7, which is equivalent to y = 0.4x - 2.
To see this, we can take two points on the graph and calculate the slope between them. For example, we can take the points (2, -2) and (4, 3). The slope between these two points is:
(3 - (-2)) / (4 - 2) = 5 / 2 = 2.5
This means that the equation of the line must be of the form y = 2.5x + b for some constant b. To find b, we can substitute one of the points on the graph into the equation. For example, we can substitute the point (2, -2):
-2 = 2.5 * 2 + b
-2 = 5 + b
b = -7
Therefore, the equation of the line is y = 2.5x - 7, which is equivalent to y = 0.4x - 2.