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| Math Central | Quandaries & Queries |
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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?
Penny
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