Question

Annaliza's car is stopped at a stoplight. She gradually increases her speed until she reaches the speed limit. She travels at this speed for a while and then has to slow to a stop for the next stop sign. She then has to increase her speed again until she reaches the speed limit in which she travels at that speed limit until once again she approaches a stop sign. Which of the following graphs represent Katherine’s speed while driving her car?

Answer 1

Every time that she stopped, the value of the speed is 0, the speed limit is the maximum represented in the graph and when she travels at this speed for a while the graph is a horizontal line.

So she starts at 0, then increases her speed until a limit then she drives at this speed for a while which is represented by a horizontal line. then, she has to slow to a stop, which means she goes back to 0, later increases her speed until the limit, drives a while until she finds a stop sign, represented by a horizontal line, and then goes to 0.

In conclusion, the graph that represents the journy is the fourth graph.