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

Questions

1. 1. How many points should you plot to check a straight line?

   • 1
   • at least 3
   • 2 exactly
   • 10
   Check

2. 2. y = x + 2. What is y when x = −1?

   • 3
   • −3
   • −1
   • 1
   Check

3. 3. Where does y = 2x + 3 cross the y-axis?

   • (0, 2)
   • (3, 0)
   • (2, 3)
   • (0, 3)
   Check

4. 4. Where does y = 2x − 4 cross the x-axis?

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

5. 5. Your plotted points don't make a straight line for y = 3x − 1. What should you do?

   • ignore one point
   • check your table of values
   • use only two points
   • draw a curve through them
   Check

6. 6. Which point is on y = 3x − 1?

   • (2, 5)
   • (1, 3)
   • (0, 1)
   • (5, 2)
   Check

7. 7. y = −x. Which point is on it?

   • (3, −3)
   • (3, 3)
   • (−3, −3)
   • (0, 3)
   Check

8. 8. y = x and y = −x cross at …

   • they never cross
   • (1, 1)
   • (0, 0)
   • (1, −1)
   Check

9. 9. Lines y = 2x + 1 and y = 2x + 5 are …

   • the same line
   • crossing at (0, 0)
   • parallel
   • perpendicular
   Check

10. 10. y = 4 − 2x. Complete: x = 3, y = ?

    • 10
    • −6
    • 2
    • −2
    Check

11. 11. Where do y = x + 1 and y = 5 meet?

    • (4, 5)
    • (1, 5)
    • (5, 6)
    • (5, 4)
    Check

12. 12. Plotting points: the first number tells you to go …

    • down first
    • across (x)
    • diagonally
    • up (y)
    Check

13. 13. A line passes through (0, 1) and (1, 4). Its equation is …

    • y = 4x + 1
    • y = x + 3
    • y = 3x + 1
    • y = 3x + 4
    Check

14. 14. Is (−2, −3) on y = 2x + 1?

    • Yes
    • No
    Check

15. 15. Graph of y = 3 crosses the y-axis at …

    • (3, 0)
    • (3, 3)
    • it doesn't
    • (0, 3)
    Check