Each of these Graphs were constructed from a series of continuous Data, X (horizontal Axis), a series of discrete binary (dummy) data, D and a continuous dependent variable, Y (vertical axis). The regression model is as follows

y=?_0+?_1 X+?_2 D+?_3 (X*D)+u

The Orange Line is the expectation when D= 0 given X, and the blue line is expectation when D = 1 given X.Find each coefficient for the following graphs.

120 100 80 40 20 S 10 15 20 25 30 35 Po = 81 = B2 = Ba =