Quadratic growth
Allowance
When Linda was 14, her parents decided that she would receive
a monthly allowance of $50, which she could spend or save. At
the time, Linda already had $150 in savings.
Linda's spendings increased over time. The following
table describes her income and spending starting with
the first month in which she received her allowence:
| savings at end of month |
spending |
income |
month |
| 180 |
20 |
50 |
1 |
| 208 |
22 |
50 |
2 |
| 234 |
24 |
50 |
3 |
| 258 |
26 |
50 |
4 |
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Present Linda's savings using the
Quadratic growth tool.
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What does the graphic representation tell you about
Linda's future financial situation?
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Introduce variations into the story and describe how
these variations affect the quantities that describe the change in the
Quadratic growth tool.
Describe how these variations affect Linda's future financial situation.
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