Question

keith is a software salesman. let y represent his total pay (in dollars). let x represent the number of copies of english is fun he sells. suppose that x and y are related by the equation y = 2500 + 110x. answer the questions below. note that a change can be an increase or a decrease. for an increase, use a positive number. for a decrease, use a negative number. (a) what is the change in keith’s total pay for each copy of english is fun he sells? $\square$ (b) what is keith’s total pay if he doesn’t sell any copies of english is fun? $\square$

Explanation:

Step1: Solve part (a)

The equation for total pay is \( y = 2500 + 110x \). The change in total pay for each copy sold is the coefficient of \( x \), which represents the rate of change (slope). So the change per copy is \( 110 \) dollars (positive since it's an increase).

Step2: Solve part (b)

If Keith doesn't sell any copies, \( x = 0 \). Substitute \( x = 0 \) into the equation \( y = 2500 + 110x \). So \( y = 2500 + 110(0) = 2500 \) dollars.

Answer:

(a) \(\$110\)
(b) \(\$2500\)