What can predict how much a motion picture will make? We have data on a number of recent releases that includes the US Gross (in $M), the Budget ($M), the Run Time (minutes), and the average number of Stars awarded by reviewers. The first several entries in the data table look like this:

We want a regression model to predict US Gross. Parts of the regression output computed in Excel look like this:
Dependent variable is-. US Gross ($)
R squared = 47.4% R squared (adjusted) = 46.0%
s = 46.41 with 120 - 4 = 116 degrees of freedom

a) Write the multiple regression equation.
b) What is the interpretation of the coefficient of Budget in this regression model?