Consider the sample data included in worksheet Q2 of the "Test - Regression Analysis.xlsx" Excel file. Excel data file a. Construct a scatterplot and verify that estimating a simple linear regression is appropriate. (Click to select) b. Calculate bo and b1. What is the sample regression equation? Predict y if x equals 15. (Round answers to 2 decimal places.) 9 = X X 15 c. Interpret the slope coefficient, b1. Enter the slope coefficient as an absolute value and indicate whether it increases or decreases. Do not round. The response variable is expected to (Click to select) v units when (Click to select) v (Click to select) v unit(s). d. What is the standard error of the regression estimate? (Round answer to 2 decimal places.)