Karen Morrison and Nick Hamshaw Solutions for Exercise 6: Exercise 21.6

The following distance-time graph represents Monica's journey from home to a supermarket and back again.

At what times was Monica $800 \mathrm{m}$ from home?

The following distance-time graph represents Monica's journey from home to a supermarket and back again.

On which part of the journey did Monica travel faster, going to the super market or returning home?

Omar left school at $16.30$. On his way home, he stopped at a friend's house before going home on his bicycle. The graph shows this information.

How long did he stay at his friend's house?

Omar left school at $16.30$. On his way home, he stopped at a friend's house before going home on his bicycle. The graph shows this information.

At what time did Omar arrived home?

Omar left school at $16.30$. On his way home, he stopped at a friend's house before going home on his bicycle. The graph shows this information.

Omar's brother left school at $16.45$ and walked home using the same route as Omar. If he walked at $4 \mathrm{km}$ per hour, work out at what time the brother passed Omar's friend's house.

A swimming pool is $25 \mathrm{m}$ long. Jasmine swims from one end to the other in $20$ seconds. She rests for $10$ seconds and then swims back to the starting point. It takes her $30$ seconds to swim the second length. Draw a distance-time graph for Jasmine's swim.

A swimming pool is $25 \mathrm{m}$ long. Jasmine swims from one end to the other in $20$ seconds. She rests for $10$ seconds and then swims back to the starting point. It takes her $30$ seconds to swim the second length. Draw a distance-time graph for Jasmine's swim. Then find how far was Jasmine from her starting point after $12$ seconds.

A swimming pool is $25 \mathrm{m}$ long. Jasmine swims from one end to the other in $20$ seconds. She rests for $10$ seconds and then swims back to the starting point. It takes her $30$ seconds to swim the second length. Draw a distance-time graph for Jasmine's swim. Then find how far was Jasmine from her starting point after $54$ seconds.