Explanation: The rate of change is 7.5 (since 90 divided by 12 is 7.5) The way I made sure that the rate of change was 7.5 is that I doubled the hours and money. So I did 24 times 7.5 and it equaled 180 (so my rate of change is correct). After I’ve known that my rate of change is correct, I answered the question. I did 29 times 7.5 (the rate of change) and got $217.50 Hope I helped :)