As a salesperson at Scrapbooks and
Treasures, Alysse receives a monthly base
pay plus commission on all that she sells.
If she sells $500 worth of merchandise in
one month, she is paid $400. If she sells
$1,000 of merchandise in one month, she
is paid $500.
Find Alysse's total salary when she sells
$2,000 worth of merchandise.
Assume that total salary is a linear function
of the amount of goods sold.