
Concept explainers
Of the given situations which is proportional and which is non proportional.

Answer to Problem 17HP
The result is Abraham's savings is not proportional.
The result is John's savings is proportional
Explanation of Solution
Giveninformation:
John decides to save $20 each week.
Abraham has already $10 and wants to save additional $20 each week.
Money saved by Abraham in the first week is $30.
Money saved by Abraham in the second week is $50.
Ratio between the weeks and money is
Thus the ratio is not constant.
Hence, the result is Abraham's savings is not proportional.
Money saved by John in the first week is $20.
Money saved by John in the second week is $40.
Ratio between the weeks and money is
Thus the ratio is constant.
Hence, the result is John's savings is proportional.
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