The amount of money, y, that Valentina earns at her job after working x hours is given by the direct variation equation y=12.5x. Identify the constant of proportionality. What does the constant of proportionality represent?
A. the constant of proportionality is 1/12.5, and it represents the amount of money Valentina earns each hour at her job
B. the constant of proportionality is 12.5, and it represents Valentina's hourly wage.
C. the constant of proportionality is 1/12.5, and it represents the amount of money Valentina earns each week at her job
D. the constant of proportionality is 12.5, and it represents the number of hours Valentina works each week at her job
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B. the constant of proportionality is 12.5, and it represents Valentina's hourly wage.
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