write an integer to represent each piece of data: Jan earned 7 dollars interest in her savings account last month.

please explain?

The only data you posted was $7 dollars.

To represent the amount of dollars Jan earned in her savings account last month, you can use the integer 7.

An integer is a whole number that can be positive, negative, or zero. In this case, the integer 7 represents the positive amount of 7 dollars that Jan earned in interest.