To raise money, a school band is selling tickets to a breakfast. The graph on the coordinate grid below shows the functional relationship between the number of tickets sold and the revenue.

Question

The graph shows revenue in dollars on vertical axis and number of tickets sold on horizontal axis. A segment from (0, 0) to (80, 400).

What is the domain of the function?

A. integers from 0 to 400

B. real numbers from 0 to 500

C. integers from 0 to 80

D. real numbers from 0 to 100

Answer 1

The domain of the function in this context represents the possible number of tickets sold. Since the graph shows a linear relationship between the number of tickets sold (on the horizontal axis) and the revenue (on the vertical axis), we observe that the number of tickets sold ranges from 0 to 80.

Since tickets sold must be a whole number (you cannot sell a fraction of a ticket), the domain consists of the integers from 0 to 80.

Therefore, the correct answer is:

C. integers from 0 to 80