The equation y = 13x describes the amount of money Sarah earns, where x is the number of hours she works
and y is the amount of money she earns.
The table shows the amount of money Austin earns for different numbers of hours worked.
Austin’s Earnings
Time (h) 3 5 8 10
Money ($)
earned
42 70 112 140
(a) How much money does Austin earn per hour? Show your work.
(b) Who earns more per hour? Justify your answer.
(c) Draw a graph that represents Austin’s earnings over time in hours. Remember to label the axes.