Answer:
They're asking you to explain how the race went bit you have to roughly explain just by looking at the graph.
Step-by-step explanation:
Alberta- She didn't start at the beginning but now she's running as fast as she can. Wow, she's gaining speed like crazy and may be the fastest contestant. (The line is extremely straight which means she gains speed fast and runs very quick at a constant speed)
Betsy- Betsy is starting slowly but surely and speeds up. She gets to the finish quite fast. (The line has a slanted slope at first but gets very straight and vertical eventually which means there is a high speed)
Carla- Carla is starting the race at 500 meters but she is running very smoothly and constantly without slowing down. (I say this because you can see on the distance line that she starts at the middle and for the speed you can see the line is straight which means its constant.)
Dora- Dora has a constant page and is running quite well but ooh she stops. Maybe she's already tired of running but she's got a long way to go. She's running again! A fast and constant pace just like at the start. (You can see at line is straight which means a constant pace but then the line stops which means she stopped running. Then at the end you can see a constant pace again)