iStarSign in

Math 8 · Unit 9: Sequences and functions · Cambridge Lower Secondary Maths Stage 8

9.4 Representing simple functions

15 questions · e.g. Function x → 3x − 4. Output for input 5?

Practice

Questions

  1. 1. Function x → 3x − 4. Output for input 5?

    Check

  2. 2. Function x → 3x − 4. Input for output 20?

    Check

  3. 3. Inverse of x → 2x + 1?

    Check

  4. 4. Machine: × 4, then + 3. Input 2. Output?

    Check

  5. 5. Machine: + 3, then × 4. Input 2. Output?

    Check

  6. 6. Write x → 5x − 2 as an equation.

    Check

  7. 7. Inputs 1, 2, 3 give outputs 4, 7, 10. Rule?

    Check

  8. 8. Function x → x². Output for −3?

    Check

  9. 9. Function x → x ÷ 2 + 6. Output for 10?

    Check

  10. 10. Function x → 10 − x. Output for 3?

    Check

  11. 11. Inverse of x → x − 7?

    Check

  12. 12. Inverse of x → 4x?

    Check

  13. 13. Inputs 0, 1, 2 give outputs 5, 3, 1. Rule?

    Check

  14. 14. Machine: × 2, then − 5. Output is 13. Input?

    Check

  15. 15. y = 2x + 3. When x = −1, y = ?

    Check