We included **HMH Into Math Grade 8 Answer Key PDF** **Module 6 Review **to make students experts in learning maths.

## HMH Into Math Grade 8 Module 6 Review Answer Key

**Vocabulary**

domain

function

linear

nonlinear

range

relation

**For Problems 1—6, choose the correct term from the box to complete each sentence.**

Question 1.

A ____ is any set of ordered pairs.

Answer: A **relation** is any set of ordered pairs.

A relation is a set of ordered pairs and the first component in the set of ordered pairs is called the domain.

Question 2.

The ___ of a function is the set of all possible input values.

Answer: The **domain** of a function is the set of all possible input values.

Question 3.

A function whose graph is not a straight line is ___.

Answer: A function whose graph is not a straight line is **nonlinear**.

Question 4.

The ____ of a function is the set of all possible output values.

Answer: The **range** of a function is the set of all possible output values.

Question 5.

A ____ is a relation with exactly one output for each input.

Answer: A **function** is a relation with exactly one output for each input.

Question 6.

A function whose graph is a straight line is ____.

Answer: A function whose graph is a straight line is **linear**.

Question 7.

What is y = mx + b, and what do m and b represent?

Answer:

y = mx + b

m represents slope and b represents

**Concepts and Skills**

Question 8.

**Use** The graph shows the temperature in a refrigerator over time, where x is the time in hours and y is the temperature in degrees Celsius. Write the equation of the line shown in the graph. State what strategy and tool you will use to answer the question, explain your choice, and then find the answer.

Answer:

Question 9.

Which of these functions are linear? Select all that apply.

A. y = \(\frac{4}{x}\)

B. y = -4x + 1

C. y = 2x^{3} + 3

D. y = 2^{x} + 8

E. y = 4 – \(\frac{2}{3} x\)

F. y = 5(x – 0.6)

Answer:

Question 10.

On the coordinate plane, draw a linear function that increases at a constant rate.

Answer:

Question 11.

Is the relation shown in the graph a function? Explain.

Answer:

Question 12.

The table shows the total cost t of owning a smartphone for m months. Write an equation that represents this function.

Answer:

Question 13.

Which function has the greatest rate of change?

A.

B. y = 3x + 7

C.

D. You pay an initial fee of $10 and then $1.00 per week for x weeks.

Answer:

Question 14.

The equation y = 5x – 30 models a scuba diver’s elevation in feet y after x minutes. Based on the equation, which statement is true?

A. The diver starts at sea level and reaches a depth of 30 feet after 5 minutes.

B. The diver starts at the ocean floor and reaches a depth of 5 feet after 30 minutes.

C. The diver starts 30 feet below sea level and ascends 5 feet per minute.

D. The diver starts 5 feet above sea level and descends 30 feet per minute.

Answer:

D. The diver starts 5 feet above sea level and descends 30 feet per minute.

Question 15.

It takes Zeke 45 minutes to walk 1.5 miles from his house to the library. He starts out walking fast and then stops for 10 minutes to talk to a friend. Then he continues on at a slower rate. Draw segments to complete a possible graph of Zeke’s walk.

Answer:

Question 16.

Complete the table to show a relation that is not a function.

Answer: