Introduction to Functions

Question 1

Which graph represents a function?

Revolt · Accepted Answer

D: [Image: On a coordinate plane, a straight horizontal line ...]

Question 2

The set of ordered pairs (–1, 8), (0, 3), (1, –2), and (2, –7) represent a function. What is the range of the function?

Revolt · Accepted Answer

B: {y: y = –7, –2, 3, 8}

Question 3

Determine the domain and range of the given function.

Revolt · Accepted Answer

A: ✔ all real numbers

Question 4

Which ordered pair could be removed to make this relation a function?

Revolt · Accepted Answer

C: (4, –2)

Question 5

Which statements are true of functions? Check all that apply.All functions have a dependent variable.All functions have an independent variable.The range of a function includes its domain.A vertical line is an example of a functional relationship.A horizontal line is an example of a functional relationship.Each output value of a function can correspond to only one input value.

Revolt · Accepted Answer

A: All functions have a dependent variable.; B: All functions have an independent variable.; E: A horizontal line is an example of a functional relationship.

Question 6

Which represents a function?

Revolt · Accepted Answer

B: [Image: StartSet (negative 8, negative 2), (negative 4, 1)...]

Question 7

Consider a function that describes how a particular car’s gas mileage depends on its speed. What would be an appropriate domain for this function?

Revolt · Accepted Answer

A: 0 to 100 miles per hour

Question 8

Emma is an artist and has created seven paintings. She plans to paint three additional paintings each week. What statements are true of this scenario? Check all that apply.The independent variable is represented by the output values.The dependent variable is the total number of paintings.The total number of paintings depends on the number of weeks that have passed.This scenario is a function because for each week that passes, there will be exactly one total number of paintings.The number of weeks is the output value.

Revolt · Accepted Answer

B: The dependent variable is the total number of paintings.; C: The total number of paintings depends on the number of weeks that have passed.; D: This scenario is a function because for each week that passes, there will be exactly one total number of paintings.

Question 9

all real numbers✔ all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}X {y: y = –2, –1, 0, 1, 2}

Revolt · Accepted Answer

B: ✔ all real numbers greater than or equal to –2

Question 10

Which did you include in your response?

Revolt · Accepted Answer

PENDING

Introduction to Functions Answers

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