Please answer all a questions

Fitting a straight line to a set of data yields the following prediction line. Complete (a) through (c) below. Y , = 18 - 0.8X , a. Interpret the meaning of the Y-intercept, bo. Choose the correct answer below. O A. The Y-intercept, bo = 18, implies that the average value of Y is 18. O B. The Y-intercept, bo = 18, implies that for each increase of 1 unit in X, the value of Y is expected to increase by 18 units. C. The Y-intercept, bo = 18, implies that when the value of X is 0, the mean value of Y is 18. D. The Y-intercept, bo = -0.8, implies that when the value of X is 0, the mean value of Y is - 0.8. b. Interpret the meaning of the slope, b,. Choose the correct answer below. O A. The slope, by = 18, implies that for each increase of 1 unit in X, the value of Y is expected to increase by 18 units. O B. The slope, b, = - 0.8, implies that for each increase of 1 unit in X, the value of Y is estimated to decrease by 0.8 units. O C. The slope, by = - 0.8, implies that the average value of Y is - 0.8. O D. The slope, b, =0.8, implies that for each increase of 1 unit in X, the value of Y is expected to increase by 0.8 units. c. Predict the mean value of Y for X = 7. Yi =(Type an integer or a decimal.)