Tommy has a lawn service. He earns $25 for every lawn he mows. Which of the following represents the rate of change of his income with respect to the number of lawns he mows? 2 lawns
$12.50

2 lawns $12.50

2 lawns
$50

2 lawns $50

$
12.50
2 lawns

$ 12.50 2 lawns

$50
2 lawns