Question

You are trying to save money for a new bicycle. You earn $30 mowing your neighbors' lawns each

week and initially have $18 in the bank. Write an equation that models your savings as a function of
time (in weeks).

Answer 1

f(w)=30w+18
Let w represent weeks. If you initial is 18 it is adding 18 to each week that you earn 30. That it is why it is 30 times the amount of weeks added to the number you started with.