Question

A function is created to represent the amount of money spent on lunch if you spent 5 dollars a day. What restrictions would be made to the range?

The range would only include integers.

The range would only include negative integers.

The range would only include positive integers.

The range would include all real numbers.

Answer 1

If lunch costs $5 a day, but you haven't had one lunch yet, you have spent $0. After 1 day, you would've spent $5. After 2 days, you would have spent $10. This goes on like this, so that the total amount spent up to any day is $0, $5, $10, $15, $20, etc, or $5n, where n is the number of days.
Now look at the numbers that represent the amount spent: 0, 5, 10, 15, 20, 25, ...
Which choice above makes sense?

Answer 2

The range would only include positive integers.