Writing and interpreting linear functions

Given equation

y = 30x + 50

Which part is the

RATE?

• y

• 30

• x

• 50

Joe has a lemonade stand. He charges for the cup and he charges for each ounce of lemonade poured into the cup. The expression 1+0.5x represents the total cost of a cup of lemonade. What does the VARIABLE represent?

• the cost of each ounce of lemonade

• the total cost for a cup of lemonade

• the number of ounces of lemonade poured

• the cost of the cup

The cost of airing a commercial on television is modeled by the function C(n)=110n+900, where n is the number of times the commercial is aired. Based on this model, which statement is true?

• The commercial costs $0 to produce and $110 per airing up to $900.

• The commercial costs $110 to produce and $900 each time it is aired.

• The commercial costs $900 to produce and $110 each time it is aired.

• The commercial costs $1010 to produce and can air an unlimited number of times.

Fill in the blank. y = 5x - 4 means ___________ 5 and x and subtract 4 to get y.

Let's call the graph f(x). Find f(0) = ___

• 25

• 30

• 50

• 60

How many hours of sleep will people get if they don't drink any coffee?

• 6

• 7.5

• 8

• 8.5

How do you feel about the test?

• Great

• Good

• Okay

• Bad

A plumber charges $50 for a house call plus $12 per hour for labor. The linear function P(x) represents the cost of the plumber for x hours.

P(x) = 50 + 12x

Find P(4)

• $86

• $98

• $110

• $74

A company offers a printing service with a setup fee and a cost per page. The total printing cost \( P \) in dollars can be described by the equation \( P = 20 + 0.05x \), where \( x \) is the number of pages printed. What does the slope of this equation represent?

• The setup fee for printing

• The cost per page printed

• The total cost of printing

• The number of pages printed

According to the graphic, Bonnie would need to pay $__ to sign- up for Fabulous Fitness.

Click on the picture if you need to review it once more.