Chapter 14.3, Problem 5AYU

(a)

To determine

To interpret: The slope coefficients for $x_1 \text{and }{x}_2.$

(b)

Section 1

To determine

To compute: The regression equation when $x_1=10$.

Section 2

To determine

To draw: The graph of the obtained regression equation.

(c)

Section 1

To determine

The regression equation when $x_1=15$.

Section 2

To determine

To draw: The graph of the obtained regression equation.

(d)

Section 1

To determine

The regression equation when $x_1=20$.

To determine

To draw: The graph of the obtained regression equation.

(e)

To determine

To explain: The effect when $x_1$ changes.