Lesson T6.1.2

T6.1.2 Line charts and grouped data Quiz: KS3 Maths, Unit 6

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson T6.1.2, Line charts and grouped data: 20 multiple choice questions for the KS3 Maths (National Curriculum), Unit 6: Statistics, written with Revision Ninja.

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The 20 questions

  1. Which chart is best for showing how data changes over time?

    • A pie chart
    • A frequency table with no times
    • A line graph
    • A pictogram with no key

  2. In a grouped frequency table, the class 10 to 19 contains which values?

    • Whole numbers from 10 to 19
    • Numbers from 0 to 10, rounded up
    • Only the number 19, the upper limit
    • Only the number 10 as a lower limit

  3. A line graph shows temperature rising from 10 °C at 9am to 14 °C at 11am. What is the rate of change?

    • 0.5 °C per hour
    • 4 °C per hour
    • 6 °C per hour
    • 2 °C per hour

  4. What is the modal class in a grouped frequency table?

    • The class with the highest frequency
    • The class that contains the mean
    • The class with the lowest frequency
    • The class that contains the median only

  5. A grouped table shows 0-4 with frequency 3, 5-9 with frequency 7 and 10-14 with frequency 2. What is the total?

    • 3
    • 12
    • 10
    • 14

  6. A class interval runs from 10 to 20. What is its midpoint?

    • 20
    • 10
    • 30
    • 15

  7. On a line graph, what does the overall direction of the line show?

    • Only the highest value
    • The axis labels
    • The title
    • The trend

  8. A line graph shows sales rising from 50 to 80 over 3 months. How much did sales rise?

    • 3 units
    • 50 units
    • 80 units
    • 30 units

  9. When comparing two sets of data on a line graph, what should you do?

    • Use a pie chart instead
    • Use separate paper for each set
    • Plot only the first set
    • Plot both data sets on the same axes

  10. Why are class intervals used for grouped data?

    • To summarise large amounts of continuous data
    • To hide outliers so the data looks neater
    • To change the units of the original data values
    • To make the data look bigger on the page

  11. Temperature is 20 at 0 min, 26 at 10 min and 32 at 20 min. It rises by 6 each 10 minutes. What is it at 30 min?

    • 38 °C
    • 35 °C
    • 44 °C
    • 36 °C

  12. On a line graph, what does a steeper line show?

    • A faster rate of change
    • Less data collected
    • A lower mean value
    • Smaller values overall

  13. A frequency table has groups 0-9 (4 people), 10-19 (6 people) and 20-29 (5 people). How many people are there in total?

    • 16
    • 15
    • 20
    • 10

  14. On a line graph, a flat section means what?

    • The object doubled in size
    • The object sped up
    • The object went backwards
    • The object stopped

  15. A grouped table has 0-9 with frequency 3, 10-19 with frequency 8 and 20-29 with frequency 5. Which class is the modal class?

    • 10-19
    • 20-29
    • 3
    • 0-9

  16. What is the midpoint of the class 40-49?

    • 45
    • 49
    • 44
    • 44.5

  17. A line graph shows distance 0 km at 0 hours, 60 km at 1 hour and 120 km at 2 hours. What is the speed?

    • 30 km/h
    • 120 km/h
    • 2 km/h
    • 60 km/h

  18. What is the midpoint of the class 60-69?

    • 65
    • 64
    • 69
    • 64.5

  19. Which inequality describes the class 20-29 in a grouped table?

    • 20 ≤ x < 30
    • 20 < x ≤ 29
    • 20 ≤ x ≤ 30
    • 19 < x < 29

  20. A line passes through (2, 5) and (6, 13). What is its gradient?

    • 4
    • 2
    • 0.5
    • 8

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