Which equation shows 2.4 as the constant of
proportionality?

c) a = 2.4b

Explanation:

Option C is the correct answer.

Constant of proportionality refers to the ratio between two quantities which are proportional to each other.

In the given equation, the two quantities a and b are directly proportional to each other. When two quantities are directly proportional to each other, they increase and decrease at the same time.

So, a and b are directly proportional to each, therefore the relationship between them is:

a = 2.4b

where 2.4 is the constant of proportionality while a and b are the quantities.

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