Displacement-time graphs (Part 1)

Maths

Ratio, real life graphs, and rates of change

You will need to use this graph to answer today's questions. Sue is represented by the pink line, that starts at (9:20, 0). Bob is represented by the green line, that starts at (9:38, 0).

Fill in the gap: Starting from home, Sue walked for 2 km at a steady speed of _____ km per hour.

Fill in the gap: After 20 minutes, Sue stopped to chat for _____ minutes.

Fill in the gap: Sue then continued at a steady speed of _____ km per hour until she reached the shops.

Bob and Sue reach the shops at what time?

Assuming Bob and Sue both start their journeys from home, who lives furthest from the shops?

Which of the following calculations can be used to work out speed?

Becky runs at 7 km/h for half an hour. How far does she run?

Ella cycles 18 miles in one and a half hours. What is her average speed in miles per hour?

A train travels 75 miles at an average speed of 25 mph. How long does the journey take?

On the first part of the journey a car travels 160 km in 3 hours. On the second part of the journey the car travels 140 km in 2 hours. What is the average speed of the car over the whole journey?

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