Linear Functions

Multiple Choice

The Roaming Cell Phone Company charges $15.00 per month plus $0.20 per minute of airtime usage.  If Juanita uses x minutes of airtime, what is an equation that can be used to determine her monthly cell phone bill (C)?

• C = 0.20x + 15
• C =15 (0.20x)
• C = 15 + x + 0.20
• C = 0.20 + 15x

Multiple Choice

Margaret is a waitress at The Seafood Bonanza.  She earns $3 an hour plus 90% of her tips.  Write an equation for her salary, S, if she works h hours and earns d dollars in tips.

• 3h + 0.90d = S
• S = 90d + 3h
• S = 3d + 90h
• S = 3h + 9.0d

Multiple Choice

Speedy Boat Rental charges a $15 deposit fee plus $2 for each hour of use to rent a paddle boat.  Write an equation for C, the total cost, to rent the boat for h hours.

• h = 2C + 15
• C = 15h + 2
• h = 15C + 2
• C = 2h + 15

Identifying Linear Functions

By Jennifer McLeod

​Linear functions must have a straight line.

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Multiple Choice

Is the function linear or nonlinear?

• Linear Function
• Nonlinear Function

Multiple Choice

Is the function linear or nonlinear?

• Linear Function
• Nonlinear Function

Multiple Choice

Is this function linear or non linear?

• Linear
• Non Linear

Multiple Choice

Is this function linear or nonlinear?

• Linear
• Nonlinear

Multiple Choice

Which of the following is NOT a linear function?

• y = 3x
• y = x²
• y = 5x - 9
• y = 3(x + 4)

Multiple Choice

Linear functions cannot have __________.

• An x nor a y
• x + y
• x - y
• xy

Standard 8.F.1 , 8.F.2 and 8.F.4

I can identify functions.

I can analyze linear functions.

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Analyzing Linear Functions

Math Response

Enter the answer in the space provided.

Enter as a decimal.

Type answer here

Correct Answer: 1.25

Deg^°

Rad

Multiple Choice

CHOOSE THE CORRECT ANSWER.

• The rate of change of Function 1 is 2 times the rate of change of Function 2.

• The rate of change of Function 2 is 3 times the rate of change of Function 1.

• The rate of change of Function 1 is 4 more than the rate of change of Function 2.

• The rate of change of Function 2 is 6 less than the rate of change of Function 1.

Hotspot

SELECT ALL THAT APPLY.

CLICK THE CIRCLE BESIDES EACH ANSWER TO SELECT YOUR ANSWER.

HINT: SELECT THREE.

Graphing

PLOT THE POINT $$\left(-5,2\right)$$

Multiple Select

What does the m stand for? Select all that apply.

• slope

• constant rate of change

• initial value

• y-intercept

Multiple Select

Which are key words for constant rate of change? Select all that apply.

• per

• each

• start

• every

• begin

Multiple Select

What does the b stand for? Select all that apply.

• slope

• constant rate of change

• initial value

• y-intercept

Multiple Select

Which of the following can help you find the initial value? Select all that apply.

• rise/run

• look for when x=0

• the point where the line hits the y-axis

• change in y / change in x

• key words: start, begin

Multiple Select

Which are key words for initial value? Select all that apply.

• per

• one-time fee

• start

• every

• begin

Multiple Choice

Write an equation to represent the linear function: Mrs. Sauer has a rock collection. Mr. Sauer gave her 3 rocks to start. Mrs. Sauer adds 1 rock to her collection each week.

• y=x+3

• y=3x+1

• y=1/3x

Multiple Choice

Write an equation to represent the linear function: One day, Mrs. Fox tried to go skiing. She started at the top of a 400 foot hill and fell down at a rate of 20 feet per minute.

• y=20x+400

• y=-20x+400

• y=400x+20

• y=400x-20