Math 7 · Unit 11: Graphs · Cambridge Lower Secondary Maths Stage 7

Questions

1. 1. Question 1a: this is a graph of distance against time for Erica as she runs. How far does Erica run in 10 minutes?

   • 10 km
   • 1 km
   • 4 km
   • 2 km
   Check

2. 2. Question 1b: how long does Erica take to run 6 km?

   • 30 minutes
   • 25 minutes
   • 35 minutes
   • 6 minutes
   Check

3. 3. Question 1c: use the graph to complete the table of distances for 5, 10, 15, 20 and 25 minutes.

   • 1, 2, 3, 4 and 5 km
   • 1, 2, 4, 8 and 16 km
   • 5, 10, 15, 20 and 25 km
   • 2, 4, 6, 8 and 10 km
   Check

4. 4. Question 1d: the graph is a straight line. What does that tell you about Erica's speed?

   • She is not moving.
   • She is slowing down.
   • Her speed is constant.
   • She is speeding up.
   Check

5. 5. Question 1e: Erica runs 1 km every 5 minutes. How far will she run in 1 hour at the same speed?

   • 12 km
   • 10 km
   • 9 km
   • 60 km
   Check

6. 6. Question 1f: a marathon is 42 km. How long will it take Erica to run a marathon at this speed?

   • 42 minutes
   • 4 hours
   • 3½ hours
   • 2 hours 6 minutes
   Check

7. 7. Question 2a: Bilal is reading a book. How many pages does he read in 4 hours?

   • 120
   • 200
   • 160
   • 40
   Check

8. 8. Question 2b: how long does Bilal take to read 100 pages?

   • 3 hours
   • 2 hours
   • 2½ hours
   • 100 hours
   Check

9. 9. Question 2c: what is Bilal's rate of reading, in pages per hour?

   • 50
   • 4
   • 160
   • 40
   Check

10. 10. Question 2d: the book has 240 pages. How long will it take Bilal to read the book?

    • 60 hours
    • 6 hours
    • 8 hours
    • 4 hours
    Check

11. 11. Question 2e: choose the correct word for the gradient of Bilal's graph.

    • positive
    • zero
    • negative
    Check

12. 12. Question 3a: Zara is walking home from school. How far from home is she after 15 minutes?

    • 15 km
    • 1.5 km
    • 3 km
    • 2 km
    Check

13. 13. Question 3b: how far is it from Zara's school to her home?

    • 3.5 km
    • 4 km
    • 3 km
    • 0.75 km
    Check

14. 14. Question 3c: Zara is walking home from school. How does the graph show that she is walking at a constant speed?

    • It starts at 0.
    • It is a curve.
    • It is a flat line.
    • It is a straight line.
    Check

15. 15. Question 3d: which word describes the gradient of Zara's graph?

    • positive
    • negative
    • zero
    Check

16. 16. Question 3e: complete the table: distance from home at 0, 10, 15 and 20 minutes. (At 5 minutes it is 3 km.)

    • 3.5, 2.5, 2 and 1.5 km
    • 3.5, 2, 1.5 and 1 km
    • 4, 2, 1.5 and 1 km
    • 3, 2.5, 2 and 1.5 km
    Check

17. 17. Question 3f: if Zara continues to walk at the same rate, how long will it take her to walk home from school?

    • 35 minutes
    • 25 minutes
    • 3.5 minutes
    • 30 minutes
    Check

18. 18. Question 4a: this graph shows the cost of a long-distance phone call. Find the cost of a call that lasts 8 minutes.

    • $4.60
    • $5.00
    • $1.60
    • $4.00
    Check

19. 19. Question 4b: a call costs $4. How long does the call last?

    • 20 minutes
    • 4 minutes
    • 8 minutes
    • 5 minutes
    Check

20. 20. Question 4c: describe in words how the cost of a call is calculated.

    • $5 for every 10 minutes
    • $3 for each minute
    • 50 cents a minute
    • $3 plus 20 cents for each minute
    Check