Linear Function Real-World Applications

What are the slope and y-intercept of the word problem?

• m=2 b=10

• m=10 b=2

• m=8 b=8

• m=12 b=12

Cell Phone Company initially charges $15.00 for airtime usage plus $0.20 per minute. Determine an equation that can be used to calculate monthly cell phone bill.

• y = 0.20x + 15

• y =15 (0.20x)

• y = 15 + x + 0.20

• y = 0.20 + 15x

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

A $30 startup fee is charged to join a team, as well as a $4 monthly fee. Write an equation in slope-intercept form that models this situation to determine how many months cost $58?

• 7 months

• 6 months

• 5 months

• 4 months

For lunch, Amanda had a hamburger and some potato chips. The hamburger totaled 325 calories and each chip had 12 calories. Write a liner equation to represent the situation.

• y = 12 + 325
• y = 12x  + 325
• y = 325 - 12x
• y = 325x + 12

Tags

CCSS.6.EE.C.9

Which of the following situations could be descried by the equation y= -25x + 120

• There are 120 people in the football stadium, and 25 more are entering each hour.
• A plumber charges $25 for a house call and $120 per hour.
• A teacher has 120 students. Her third period has 25 students
• There are 120 gallons of water in a tank. It releases water at a rate of 25 gallons per minute

Bob has $150 in his savings account and saves $40 per month. Which function models his savings?

• y = 150 + 40

• y = 40x + 150

• y = 150x + 40

Tags

CCSS.HSF-BF.A.1A

Who has the greater rate of change?

• CJ has a greater rate of change with 13/2
• Holland has a greater rate of change with 6
• CJ has a greater rate of change with 2/13
• They have the same rate of change.

Who has the greater rate of change?

• Tyler has the greater rate of change with 2/3
• Aubri has the greater rate of change with 3/2
• Tyler has the greater rate of change with 3/2
• They have the same rate of change.

The cost of Nate’s service is described by y = 4x + 6. The table shows the cost of Beth’s service. Find the equation for Beth's service.  Which service is cheaper for 8 movies in one month?

• Beth's service ($38 vs. $40) is cheaper
• Nate’s service ($42 vs. $44) is cheaper
• Nate’s service ($38 vs. $40) is cheaper
• Beth's service ($42 vs. $44) is cheaper

Paco's daughter will be participating in an upcoming dance recital. She will require a different costume for each dance she plans to performs.

c = the total number of costumes Paco's daughter will require

d = the number of dances Paco's daughter plans to perform

Which of the variables is independent?

• c

• d