The slope (b) in the prediction equation for Simple Linear Regression represents which of the following?
a. The value of ŷ (y-hat) when x = 1.5.
b. The amount of change in the independent variable when the dependent variable increases by one unit.
c. The angle of the best fitting diagonal line when x = 2.
d. The amount of change in the dependent variable when the independent variable increases by one unit.
