Common Core Grade 8 · 8.F

Common Core 8.F Test Generator

Create printable tests for this Common Core domain with answer keys.

Use 8.F tests to measure function fluency before Algebra 1 transition.

Create 8.F test →

Sample questions

1. If f(x)=2x+5, find f(3)
2. Find slope between (1,2) and (3,6)
3. Write rule with slope 4 and intercept -1
4. If g(x)=3x-1 and g(x)=20, solve x
5. Is {(1,2),(2,2),(3,4)} a function?

Answer key preview

1. 11

2(3) + 5 = 11.

2. 2

(6-2)/(3-1) = 2.

3. y = 4x - 1

Use y = mx + b.

Skills assessed

  • Function notation
  • Slope and rate of change
  • Rule writing
  • Table and coordinate interpretation

Common student mistakes

  • Confusing slope with intercept
  • Input-output reversal
  • Arithmetic errors in substitution

Related topic pages

Back to Grade 8 domain picker →Common Core 8.EE test generator →Grade 8 functions topic page →U.S. Common Core hub →

FAQ

What is covered in 8.F?
Function notation, linear relationships, and comparing functions.
Can I print these tests immediately?
Yes. Output is printable PDF with full answer key.