Leonard earned $100 from a bonus plus $15 per day (d) at his job this week. Which of the following e

Leonard earned $100 from a bonus plus $15 per day (d) at his job this week. Which of the following expressions best represents Leonards income for the week?

We set up an income function I(d), were d is the number of days Leonard works:
I(d) = 15d + 100

Each day, Leonard earns $15. Then we add on the $100 bonus