Grade 8Mathpractice16 questions

Linear graphs

Grade 8: coordinates, gradient, y = mx + c, read a graph.

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Free to play. Teams answer on one screen; your phone is the remote. No student devices.

Questions

  1. In the point (3, -2), which number is the y-coordinate?

    • -2
    • -3
    • 2
    • 3
    Show answer-2

  2. Which quadrant contains the point (-4, 5)?

    • First
    • Fourth
    • Second
    • Third
    Show answerSecond

  3. What are the coordinates of the midpoint of (2, 6) and (8, 2)? (Answer out loud)

    Show answer(5, 4)

  4. The point (0, 5) lies on the y-axis. (True or false?)

    Show answerTrue

  5. What is the gradient of the line through (0, 0) and (2, 6)?

    • 1/3
    • 2
    • 3
    • 6
    Show answer3

  6. What is the gradient of the line through (1, 7) and (3, 3)?

    • -1/2
    • -2
    • -4
    • 2
    Show answer-2

  7. A horizontal line has a gradient of 0. (True or false?)

    Show answerTrue

  8. What is the gradient of the line through (-2, 1) and (4, 4)? (Answer out loud)

    Show answer1/2

  9. What is the y-intercept of the line y = 3x - 4?

    • -3
    • -4
    • 3
    • 4
    Show answer-4

  10. Which line has gradient 2 and passes through (0, 5)?

    • y = -2x + 5
    • y = 2x + 5
    • y = 2x - 5
    • y = 5x + 2
    Show answery = 2x + 5

  11. A line passes through (1, 5) and (3, 9). What is its equation?

    • y = 2x + 1
    • y = 2x + 3
    • y = 3x + 2
    • y = 4x + 1
    Show answery = 2x + 3

  12. The point (2, 8) lies on the line y = 3x + 1. (True or false?)

    Show answerFalse

  13. A straight distance-time graph (km, hours) passes through (0, 0) and (2, 10). Speed?

    • 10 km/h
    • 2 km/h
    • 20 km/h
    • 5 km/h
    Show answer5 km/h

  14. A cost line is y = 2x + 3, where x is hours hired. What does the 3 mean?

    • A fixed starting charge
    • The cost after 3 hours
    • The cost per hour
    • The number of hours hired
    Show answerA fixed starting charge

  15. At what x-value does the line y = 2x - 6 cross the x-axis? (Answer out loud)

    Show answer3

  16. Where do the lines y = x and y = -x + 4 cross?

    • (1, 3)
    • (2, 2)
    • (2, 4)
    • (4, 4)
    Show answer(2, 2)

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