Rate of Change

Question 1

Based on the graph shown to the right, whose phone cost varies directly with the amount of time spent talking?

Revolt · Accepted Answer

Nikiya’s only

Question 2

Mark’s cost does not vary directly with time spent talking because

Revolt · Accepted Answer

the cost of 0 hours is not 0 dollars

Question 3

Base on these results, the runner ran at a rate between 0.5 and 2 hours than between 1.5 and 2.5 hours.

Revolt · Accepted Answer

slower

Question 4

The ratios

Revolt · Accepted Answer

are not constant;

Question 5

therefore, the points in the table form a direct variation.

Revolt · Accepted Answer

do not

Question 6

What are the coordinates for the end of the interval?

Revolt · Accepted Answer

(9, 4)

Question 7

which represents Nikiya’s

Revolt · Accepted Answer

cost per hour

Rate of Change Answers