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Grade 8 · Year 9 · Class 8 · ages 13–14

Linear functions, finding y worksheets.

Free printable linear functions, finding y worksheets with answer keys. Using y = mx + b to find y for a given x. Choose the level and the number of questions, then download a PDF or print.

  • Grade 8
  • Year 9 · Class 8
  • Ages 13–14
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  • Answer key
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Sheet 26859. Change the options above or make a new worksheet.

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Linear functions, finding y

Grade 8 · Medium · 12 questions · Sheet 26859

Name Date Score / 12

  1. 1.If y = 6x + 9, find y when x = −2:
  2. 2.If y = −x + 11, find y when x = 3:
  3. 3.If y = −x + 6, find y when x = 2:
  4. 4.If y = −3x + 6, find y when x = −3:
  5. 5.If y = 4x + 8, find y when x = −4:
  6. 6.If y = −5x + 5, find y when x = −4:
  7. 7.If y = 6x − 7, find y when x = 2:
  8. 8.If y = 3x + 12, find y when x = 1:
  9. 9.If y = 2x + 0, find y when x = −1:
  10. 10.If y = 2x − 2, find y when x = −2:
  11. 11.If y = −5x + 5, find y when x = 1:
  12. 12.If y = −2x − 4, find y when x = −4:
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About linear functions, finding y worksheets

Using y = mx + b to find y for a given x. This worksheet maker is aimed at Grade 8 (Year 9, Class 8) (ages 13–14) and makes new questions every time, with the answers worked out by a maths engine.

Teaching tip

Substitute the value of x, multiply by the slope m first, then add the intercept b.

What the three levels look like

  • Easy: If y = 6x + 8, find y when x = 5: ___
  • Medium: If y = −5x + 3, find y when x = 0: ___
  • Challenge: If y = 6x + 2, find y when x = −2: ___

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FAQ

Linear functions, finding y worksheets: questions

What grade are linear functions, finding y worksheets for?

Linear functions, finding y is usually taught around Grade 8 (Year 9, Class 8), for ages 13–14. Every grade has an easy, medium and challenge level, so you can go back to an earlier level or push ahead.

Do these linear functions, finding y worksheets include an answer key?

Yes. Press Download PDF with the answer key switched on and the last page lists every answer. Turn the key off for a clean student copy.

Can I make a new worksheet with different questions?

Yes. Press New worksheet for a fresh set of questions. Each sheet has a sheet number printed on it; open this page with the same level, question count and number to get exactly the same sheet again.

How do I help a child who finds linear functions, finding y hard?

Substitute the value of x, multiply by the slope m first, then add the intercept b. Start with the easy level, and practise a few minutes every day rather than one long session.

What is the first rule for solving equations?

Whatever you do to one side of the equation you must do to the other. Undo adding with subtracting and multiplying with dividing. Our Equation Balance game shows this on a balance scale.

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