Math 9 · Unit 15: Interpreting and discussing results · Cambridge Lower Secondary Maths Stage 9

Questions

1. 1. Kangaroos in Australia (millions): 2008, 25; 2010, 27; 2012, 34; 2014, 44; 2016, 45; 2018, 46. Which graph is best to show how the number changed over time?

   • a line graph
   • a stem-and-leaf diagram
   • a Venn diagram
   • a pie chart
   Check

2. 2. Kangaroos in Australia (millions): 2008, 25; 2010, 27; 2012, 34; 2014, 44; 2016, 45; 2018, 46. Between which two years did the number grow the most?

   • 2012 and 2014
   • 2016 and 2018
   • 2008 and 2010
   • 2014 and 2016
   Check

3. 3. Kangaroos in Australia (millions): 2008, 25; 2010, 27; 2012, 34; 2014, 44; 2016, 45; 2018, 46. By how much did the number grow from 2008 to 2018?

   • 19 million
   • 21 million
   • 25 million
   • 46 million
   Check

4. 4. Kangaroos in Australia (millions): 2008, 25; 2010, 27; 2012, 34; 2014, 44; 2016, 45; 2018, 46. By what percentage did the number grow from 2008 to 2018?

   • 46%
   • 21%
   • 84%
   • 184%
   Check

5. 5. In 2019 there were about two kangaroos for every person in Australia. With about 46 million kangaroos, roughly how many people lived in Australia?

   • about 23 million
   • about 92 million
   • about 2 million
   • about 46 million
   Check

6. 6. Tourist accommodation (%). Brisbane: budget 2, mid-scale 29, up-scale 59, luxury 10. Darwin: 8, 14, 70, 8. Melbourne: 5, 18, 60, 17. Perth: 3, 33, 50, 14. Sydney: 4, 20, 54, 22. Which city has the highest percentage of luxury accommodation?

   • Perth
   • Sydney
   • Brisbane
   • Melbourne
   Check

7. 7. Tourist accommodation (%). Brisbane: budget 2, mid-scale 29, up-scale 59, luxury 10. Darwin: 8, 14, 70, 8. Melbourne: 5, 18, 60, 17. Perth: 3, 33, 50, 14. Sydney: 4, 20, 54, 22. Which city has the highest percentage of up-scale accommodation?

   • Sydney
   • Darwin
   • Brisbane
   • Melbourne
   Check

8. 8. Tourist accommodation (%). Brisbane: budget 2, mid-scale 29, up-scale 59, luxury 10. Darwin: 8, 14, 70, 8. Melbourne: 5, 18, 60, 17. Perth: 3, 33, 50, 14. Sydney: 4, 20, 54, 22. Which chart would best show how one city's accommodation is split?

   • a pie chart
   • a frequency polygon
   • a scatter graph
   • a line graph
   Check

9. 9. Tourist accommodation (%). Brisbane: budget 2, mid-scale 29, up-scale 59, luxury 10. Darwin: 8, 14, 70, 8. Melbourne: 5, 18, 60, 17. Perth: 3, 33, 50, 14. Sydney: 4, 20, 54, 22. Which chart would best compare the five cities' luxury and budget percentages side by side?

   • five separate pie charts
   • a dual bar chart
   • a scatter graph
   • a stem-and-leaf diagram
   Check

10. 10. Tourist accommodation (%). Brisbane: budget 2, mid-scale 29, up-scale 59, luxury 10. Darwin: 8, 14, 70, 8. Melbourne: 5, 18, 60, 17. Perth: 3, 33, 50, 14. Sydney: 4, 20, 54, 22. Check one city: do Perth's percentages add up to 100%?

    • No, they add up to 90%.
    • No, they add up to 110%.
    • Yes, 3 + 33 + 50 + 14 = 100.
    • No, they add up to 97%.
    Check

11. 11. Tourist accommodation (%). Brisbane: budget 2, mid-scale 29, up-scale 59, luxury 10. Darwin: 8, 14, 70, 8. Melbourne: 5, 18, 60, 17. Perth: 3, 33, 50, 14. Sydney: 4, 20, 54, 22. Which city has the biggest share of budget accommodation?

    • Sydney
    • Melbourne
    • Darwin
    • Brisbane
    Check

12. 12. A kangaroo can jump further than 7 m. A long-jump record for people is about 9 m. Which comparison is correct?

    • A kangaroo jumps about 2 m further.
    • A person's record jump is about 2 m longer.
    • They jump the same distance.
    • A kangaroo jumps 16 m.
    Check

13. 13. A kangaroo's top speed is over 65 km/h. How far could it travel in 30 minutes at that speed?

    • about 30 km
    • about 65 km
    • about 32.5 km
    • about 130 km
    Check

14. 14. What should you do before choosing a chart for a poster?

    • Decide what the data shows and what you want the reader to compare.
    • Use the same chart for every set of data.
    • Always pick the most colourful chart.
    • Choose the chart with the fewest labels.
    Check

15. 15. Tourist accommodation (%). Brisbane: budget 2, mid-scale 29, up-scale 59, luxury 10. Darwin: 8, 14, 70, 8. Melbourne: 5, 18, 60, 17. Perth: 3, 33, 50, 14. Sydney: 4, 20, 54, 22. Brisbane's mid-scale share is 29% and Perth's is 33%. Which is true?

    • Brisbane has more mid-scale stays.
    • Perth has more stays in total.
    • They are the same.
    • Perth has a higher percentage of mid-scale stays.
    Check