Puerto Rico CRECE Mathematics Grade 7 Practice Questions - Cernimiento, Revisión Y Evaluación Continua Del Estudiante (CRECE) - Mathematics (Matemáticas), Grade 7 Exam

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A table shows a proportional relationship between hours worked ($x$) and total earnings ($y$ in dollars): $(2, 28)$, $(5, 70)$, and $(8, 112)$. What is the constant of proportionality ($k = \frac{y}{x}$)?

$$k = 14$ $$k = 7$ $$k = 28$ $$k = 12$

Correct Answer:

$$k = 14$

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