Question

David is a car salesman. He earns a salary of $750 a month, plus a commission of $300 per car that he sells. David needs to earn a minimum of $3,500 per month. Write an inequality for the number of sales he needs to make to earn his minimum. Let c represent the number of cars sold per month.

Answer 1

Let x=number of cars he sells.
$750 is his base salary.

If he sells no cars, he gets paid $750.
If he sells one car, he gets paid $750+300.
If he sells two cars, he gets paid $750+300×2.
If he sells three cars, he gets paid $750+300×3.
If he sells x cars, he gets paid $750+300×x.

Using the income function above, you can complete the inequality required.