Lucy earns money babysitting. her earnings and hours worked represent a direct variation. she worked for 4 hours and earned $25.
determine the constant of proportionality for dollars earned per hour worked
determine the constant of proportionality for hours worked per dollar earned.

For this case we have that by definition, a direct variation is given in the form:

Where:

k: It is the constant of proportionality

According to the statement we have to:

Substituting:

On the other hand we have:

the answer i think is a)

step-by-step explanation:

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