Math CentralQuandaries & Queries


Question from alayna, a student:

Jackie is saving her money to buy a coat that costs $121. If she already has $61 and saves $15 each week, in how many weeks can she buy the coat ? Make a function table to answer the question.

Hi Alayna,

Her brother Gord wanted to buy a sweater that cost $75 but he had only saved $39. If he can save $12 each week how many weeks will he have to save before he can buy the sweater?

Here is one way to set up a function table.

Week Amount left to save
0 $75 - $39 = $36
1 $36 - $12 = $24
2 $24 - $12 = $12
3 $12 - $12 = $0

Thus it will take Gord 3 weeks to save for the sweater. How long will it take Jackie?



About Math Central


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS