Question: 12.63 What are the model constant and the slope coefficient of x1 when the dummy variable equals 1 in the following equations, where x1 is

12.63 What are the model constant and the slope coefficient of x1 when the dummy variable equals 1 in the following equations, where x1 is a continuous variable and x2 is a dummy variable with a value of 0 or 1?

a. yn = 4.5 + 9.2x1 - 1.3x2 + 4.3x1x2

b. yn = -6.8 + 10.4x1 + 3.5x2 - 1.8x1x2

c. yn = 11.3 - 3.4x1 + 9.8x2 + 10.5x1x2

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