Question no. 15 For the following regression equation: (2.5) y = -3 + 2x x 3 4 1 2 4 5 0 - 1 a) Predict the value of y for x= 0 and 5. Plot the regression line and data points. b) Interpret the values of the y-intercept and slope. c) Indicate whether the line gives a positive or a negative relationship between x and y