Question

After collecting data, a salesperson finds that the dollar amount of sales he makes in a week, D, can be modeled by the equation
D
=
45.3
C
+
110.2
where C is the number of sales calls he makes that week. Which of these is a good interpretation of the intercept of this model?

A.
For each additional sales call he makes, his sales for that week will increase by about $45.30.

B.
In a week when he makes no sales calls, he will make about $110.20 in sales.

C.
In a week when he makes no sales calls, he will make about $45.30 in sales.

D.
For each additional sales call he makes, his sales for that week will increase by about $110.20.

Answer 1

B. The y-intercept 110.2 means that when C = 0 (no sales calls) the model predicts D = $110.20 in sales.