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General Information

Related Standards: MAFS.8.SP.1.3
Reporting Category: Statistics & Probability
Type: OR: Open Response
Difficulty: N/A
Question:

The amount of money Alan earns as a plumber after x hours is modeled by the equation y = $25x + $50.

What is the meaning of $25 in this model?

Answer Key:
hourly rate of pay
Possible Answer:

Other correct responses include:

  • hourly rate
  • amount he earns per hour
  • amount he charges per hour

Aligned Standards

Code Description
MAFS.8.SP.1.3: Use the equation of a linear model to solve problems in the context of bivariate measurement data, interpreting the slope and intercept. For example, in a linear model for a biology experiment, interpret a slope of 1.5 cm/hr as meaning that an additional hour of sunlight each day is associated with an additional 1.5 cm in mature plant height.


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