Answer: B) No, the two rates are not proportional
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Explanation:
The first sentence given leads to the fraction 20/15
The second sentence gives us 12/8
If the rates are proportional, then the fractions would be equal.
For now, assume they are equal. Cross multiply to get the following:
20/15 = 12/8
20*8 = 15*12
160 = 180
The two sides lead to different values, so the original equation is false. The rates are not proportional
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Another way we can see that the fractions aren't the same is to use a calculator or long division to get the decimal form
- 20/15 = 1.33 (approx)
- 12/8 = 1.5
The decimal values must be the same if we want the fractions to be equal as well.
