Function Inverses

Question 1

The equation of this type of line is y = kx. What is special about k?

Revolt · Accepted Answer

k is the slope of the line.

Question 2

Mark’s cost does not vary directly with time spent talking because the cost for t = 0 is undefined✔ the cost of 0 hours is not 0 dollarsthe C-intercept is 0

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

Based on the graph shown to the right, whose phone cost varies directly with the amount of time spent talking? Mark’s only✔ Nikiya’s onlyboth Mark’s and Nikiya’s

Revolt · Accepted Answer

Nikiya’s only

Question 7

What are the coordinates for the end of the interval?

Revolt · Accepted Answer

(9, 4)

Question 8

which represents Nikiya’s total cost✔ cost per hourtime spent talking

Revolt · Accepted Answer

cost per hour

Question 9

For this function, the average rate of change as x increases.

Revolt · Accepted Answer

increases

Function Inverses Answers

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