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Summer Jobs: Time and Take-Home Pay

Interpret slopes and intercepts, predict job times and earnings, and use linear models to make summer-work decisions.

Grade 8MathInteractive · Printable

Aligned to8.SP.A.3

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What’s included

Single worksheet
Auto-graded online
1 Common Core standard
Printable answer key
14 questions
Classroom-ready

Details

Format: Interactive · Printable
Grade: Grade 8
Subject: Math
Question types: Fill in the blank, Multiple choice, Circle the answer, Short answer

About this worksheet

What students practice

Students interpret slopes and intercepts in models of job time and earnings.
Students use linear model equations to predict values and solve planning problems.
Students distinguish model predictions from observed results.

How to use

Have students work through the models independently, showing substitutions on scratch paper. Discuss how each intercept affects a single job versus several jobs.

Curriculum

Common Core standard covered

8.SP.A.3

Use the equation of a linear model to solve problems with paired data, explaining what the slope and intercept mean.

Preview

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Summer Jobs: Time and Take-Home Pay

Use linear models to plan lawn-mowing and babysitting jobs.

Plan the Mowing Time

Use the model, not individual data rows, for predictions. Treat predicted times as estimates.

Jordan records lawn area and total job time. The total includes unloading equipment, mowing, and cleanup. A linear model is T = 0.04x + 12, where x is lawn area in square meters and T is predicted total time in minutes.