Final answer:
Richard earns $10 per lawn. Tom earns $7.50 per lawn.
Step-by-step explanation:
To find out how much money each person earns per lawn mowed, we need to divide their total earnings by the number of lawns mowed.
Richard's earnings are shown in the graph, so we can see that he earns $60 when he mows 6 lawns. Therefore, Richard earns $60/6 = $10 per lawn.
Tom's earnings are given in the table. We can see that when Tom mows 3 lawns, he earns $22.50. Therefore, Tom earns $22.50/3 = $7.50 per lawn.