A phone store employee earns a salary of $450 per week plus 10% commission on her weekly sales.

what function rule models the employers weekly earnings?

if the employee earned $570 in a week, what was the amount of her sales for that week?

If w = earnings that week, and s = sales, w - 450 = s/10, or 10 (w - 450) = s, simplified as 10w - 4,500 = s If the employee made $570 in one week, then w = 570. 10 (570) - 4,500 = s, simplified as 5,700 - 4,500 = s, simplified as 1,200 = s. So the employee made 1,200 sales that week.