Question: 12.62 What is the model constant when the dummy variable equals 1 in the following equations, where x1 is a continuous variable and x2 is

12.62 What is the model constant 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 = 9 + 6x1 + 9x2

b. yn = 7 + 4x1 + 2x2

c. yn = 4 + 4x1 + 8x2 + 9x1x2

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