Math 8 · Unit 11: Graphs · Cambridge Lower Secondary Maths Stage 8

Questions

1. 1. y = 2x − 1. Find y when x = 3.

   • 6
   • 7
   • 4
   • 5
   Check

2. 2. y = 2x − 1. Find y when x = 0.

   • 1
   • 2
   • 0
   • −1
   Check

3. 3. y = 4 − x. Find y when x = 6.

   • −2
   • 2
   • −10
   • 10
   Check

4. 4. Table: x 0, 1, 2 → y 3, 5, 7. Equation?

   • y = 2x + 3
   • y = 3x + 2
   • y = 2x + 5
   • y = x + 3
   Check

5. 5. y = 3x. Find x when y = 21.

   • 18
   • 7
   • 24
   • 63
   Check

6. 6. Which point lies on y = x + 4?

   • (2, 6)
   • (6, 2)
   • (2, 4)
   • (4, 0)
   Check

7. 7. y = ½x + 1. Find y when x = 8.

   • 17
   • 9
   • 4
   • 5
   Check

8. 8. In y = 5x − 2, when x increases by 1, y increases by …

   • 1
   • −2
   • 5
   • 3
   Check

9. 9. Table: x 1, 2, 3 → y 10, 8, 6. Equation?

   • y = 2x + 8
   • y = 12 − 2x
   • y = 10 − x
   • y = 12 + 2x
   Check

10. 10. Does (3, 10) lie on y = 3x + 1?

    • Yes
    • No
    Check

11. 11. y = −2x. Find y when x = −4.

    • −6
    • 8
    • 2
    • −8
    Check

12. 12. y = x² is …

    • constant
    • not linear
    • a straight line
    • linear
    Check

13. 13. y = 6 for all x. Its graph is …

    • a vertical line
    • a curve
    • a diagonal line
    • a horizontal line
    Check

14. 14. x = 2 for all y. Its graph is …

    • a curve
    • a horizontal line
    • a diagonal line
    • a vertical line
    Check

15. 15. y = 3x + 2. Find x when y = 14.

    • 4
    • 16
    • 44
    • 5.3
    Check