📝 Writing Linear Functions: Practice B (8.F.B.4)

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Construct a function to model a linear relationship (y = mx + b). Solve each problem.

1. Line with slope 5 through (2, 10). Equation?

2. x: 0, 1, 2, 3 → y: 6, 3, 0, -3. Equation?

3. Line with slope 3 through (2, 16). Equation?

4. x: 0, 1, 2, 3 → y: -1, 5, 11, 17. Equation?

5. Line with slope -4 through (2, 1). Equation?

6. x: 0, 1, 2, 3 → y: -5, -3, -1, 1. Equation?

7. Line with slope 6 through (2, 10). Equation?

8. x: 0, 1, 2, 3 → y: 5, 10, 15, 20. Equation?

9. Line with slope -1 through (2, -9). Equation?

10. x: 0, 1, 2, 3 → y: 3, -1, -5, -9. Equation?

11. Line with slope 4 through (2, 1). Equation?

12. x: 0, 1, 2, 3 → y: 10, 5, 0, -5. Equation?

Answer key: 1) y = 5x · 2) y = -3x + 6 · 3) y = 3x + 10 · 4) y = 6x − 1 · 5) y = -4x + 9 · 6) y = 2x − 5 · 7) y = 6x − 2 · 8) y = 5x + 5 · 9) y = -1x − 7 · 10) y = -4x + 3 · 11) y = 4x − 7 · 12) y = -5x + 10

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Worksheets › Grade 8 Math › Writing Linear Functions › Writing Linear Functions

Grade 8 (ages 13–14)Numbers & mathsFree printable PDF

About this grade 8 worksheet

Free Grade 8 math worksheet (Common Core 8.F.B.4): writing linear functions — a second set of twelve practice problems, with answer key. Skill: Construct a function to model a linear relationship (y = mx + b). Level: Grade 8 — also suits Year 9 (UK).

For teachers: skills & standards

CCSS 8.F.B.4: Construct a function to model a linear relationship (y = mx + b)
Works as a morning-work page, a centre/station activity, homework or an early-finisher task.

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It is designed for Grade 8 (ages 13–14), but use it with any child who is ready.

What skills does it build?

Construct a function to model a linear relationship (y = mx + b).

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More “Writing Linear Functions” printables (8.f.b.4: construct a function to model a linear relationship (y = mx + b))

Writing Linear Functions: Practice A (8.F.B.4) · Writing Linear Functions: Word Problems (8.F.B.4) · Writing Linear Functions: Show Your Thinking (8.F.B.4) · Writing Linear Functions: Quick Check (8.F.B.4)

All 5 writing linear functions sheets → · Grade 8 Math: all 10 skills → · All Common Core grades

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