Module 4 Review Part 1

JOBS  Jalyn made a table of how much money she will earn from babysitting. Use the table to graph the function.

Graph –x – 2y=4.

Fill in the missing values in the table for f(x)=2x – 4.

x | -2 | 0 | 2 | 4 | 6

f(x) | -8 | -4 | ​ (a)   | ​ (b)   | ​ (c)  

• 0
• 4
• 8
• 1
• 5
• 10
• 7
• -3
• -1

What is the slope of the line y=4?

• 0

• undefined

• -2

• -10

POOLS  Mr. Smith is draining his pool to have it cleaned. At 8:00 A.M., it had 2000 gallons of water and at 11:00 A.M. it had 500 gallons left to drain. What is the rate of change in the amount of water in the pool?

____ gallons/hour

Find the slope of the graphed line.

• 4/3

• 3/4

• -4/3

• -3/4

In a linear equation of the form y=mx+b, m represents the ​ (a)   and b represents the ​ (b)   .

• slope
• y-intercept
• x-intercept

SCHOOL SUPPLIES  A teacher buys 100 pencils to keep in her classroom at the beginning of the school year. She allows the students to borrow pencils, but they are not always returned. On average, she loses about 8 pencils a month. Write an equation in slope-intercept form that represents the number of pencils she has left y after x number of months.

Mathematical Equivalence

ON

Select the graph of y= –3x+5.

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• 
• 
• 

DENTISTS The equation 2y = 4692x + 324,836 can be used to estimate the number of active dentists in the United States from 2001 to 2015 where x is the number of years since 2001 and y is the number of active dentists. Rewrite the equation in slope-intercept form and interpret the parameters of the equation in the context of the situation.

The number of active dentists increased by ​ (a)   dentists each year.

In 2001, there were approximately ​ (b)   active dentists.

• 2346
• 162,418
• 4692
• 324,836
• 2