Introduction to Functions

Question 1

The cost to rent a moving truck is a flat fee of $25 plus $0.60 per mile. The equation c = 25 + 0.6m models the cost, c, in dollars for the number of miles, m, traveled in the truck.

Revolt · Accepted Answer

The is the independent variable.: miles traveled; The is the dependent variable.: cost

Question 2

The is the independent variable.

Revolt · Accepted Answer

C: miles traveled

Question 3

Leon throws a ball off a cliff. The graph represents a relation that models the ball’s height, h, in feet over time, t, in seconds.What is the domain?

Revolt · Accepted Answer

A: {t| 0 ≤ t ≤ 3}

Question 4

What is the domain of the relation?

Revolt · Accepted Answer

B: {x| x = –7, –6, 2, 3, 11}.

Question 5

Teresa stated that the heights of the students in her class were not a function of their ages. Which reasoning could justify Teresa’s statement?

Revolt · Accepted Answer

A: Two students are the same age but have different heights.

Question 6

Which represents a function?

Revolt · Accepted Answer

A:

Question 7

Which graph does not represent a function?

Revolt · Accepted Answer

C: [Image: On a coordinate plane, an oval line crosses the y-...]

Question 8

Jillian walked 0.5 miles before she started jogging at an average pace of 5 miles per hour. The equation d = 0.5 + 5t can be used to relate the total distance, d, in miles to the time, t, that Jillian spent jogging. What are the independent and dependent variables?

Revolt · Accepted Answer

B: The independent variable is time and the dependent variable is distance.

Question 9

The is the dependent variable.

Revolt · Accepted Answer

B: cost

Introduction to Functions Answers

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