Math 8 · Unit 16: Interpreting and discussing results · Cambridge Lower Secondary Maths Stage 8

Questions

1. 1. Time series graphs have … on the horizontal axis.

   • frequency
   • percentages
   • time
   • categories
   Check

2. 2. Ice cream sales rise every summer and fall every winter. This is …

   • no pattern
   • a seasonal pattern
   • a straight line
   • a decreasing trend only
   Check

3. 3. The time series graph shows a town's population. What is the trend?

   • increasing
   • decreasing
   • constant
   • seasonal
   Check

4. 4. The time series graph shows a town's population. By how much does it increase every 5 years?

   • 5600
   • 1200
   • 600
   • 500
   Check

5. 5. The time series graph shows a town's population. Estimate the population in 2025 if the trend continues.

   • 6800
   • 6500
   • 7200
   • 6200
   Check

6. 6. Monthly rainfall is highest in July each year. This is …

   • random
   • impossible
   • seasonal
   • a trend
   Check

7. 7. Points on a time series graph are joined with …

   • curves only
   • bars
   • no lines
   • straight lines
   Check

8. 8. The time series graph shows a shop's sales. What is the trend?

   • decreasing
   • increasing by 10 per month
   • constant
   • increasing by 5 per month
   Check

9. 9. A graph shows a line going down overall with small ups and downs. The trend is …

   • flat
   • decreasing
   • seasonal only
   • increasing
   Check

10. 10. Temperature at 6 a.m. 12 °C, noon 24 °C, 6 p.m. 18 °C. Highest reading?

    • noon
    • 6 a.m.
    • 6 p.m.
    Check

11. 11. Why can predictions from trends be unreliable?

    • time stops
    • trends never exist
    • things may change in the future
    • graphs are always wrong
    Check

12. 12. A shop's sales peak every December. A sensible reason is …

    • holiday shopping
    • closed shop
    • fewer people
    • random chance only
    Check

13. 13. A time series of a baby's mass each month is likely to …

    • decrease
    • increase
    • stay the same
    • be seasonal
    Check

14. 14. Sales: Q1 40, Q2 60, Q3 40, Q4 60, Q1 40… Pattern?

    • decreasing trend
    • seasonal (repeating every 2 quarters)
    • increasing trend
    • no pattern
    Check

15. 15. From 2018 (100) to 2022 (140), what was the average yearly increase?

    • 14
    • 10
    • 35
    • 40
    Check