Ricky walked away from a mall at a constant velocity for the first 30 seconds. he stopped at an ice cream parlor for 40 seconds. he then turned around and walked toward the mall again at a constant velocity for 10 seconds. he met a friend, and they both walked away from the mall at a constant velocity for the next 20 seconds. which of the following graphs best represents ricky's motion?

Answer : option C

We analyze the attached graph

First, Ricky walked away from mall at the constant speed for 30 seconds

Second, he stopped walking for 40 seconds

Third, he walked towards mall at a constant speed for 10 seconds

Fourth , both walked away for next 20 seconds

So total walk time = 30 + 40 + 10 + 20= 100 seconds

Total time is 100 seconds. so we cannot choose option B and d because the graph ends before 100 seconds.

In option A, Ricky walked away from the mall after 70 seconds. so we cannot choose option A.

Option C is the graph best represents Ricky's motion.

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.