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

? = ?0 + ?1? + ?2? + ?3 (? ? ?) + ?

The Orange Line resulted from a data where D = 0, and the blue line is the data where D = 1. Find each coefficient for the following graphs.

100 90 80 70 60 50 40 30 20 10 0 5 10 15 20 25 30 35