Interpreting Linear Functions Review

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

• A

• B

• C

• D

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.

Shelly earns 15 dollars a week. If she currently has $55, how much money will she have total after w weeks? (write an expression)

• 15 + w

• 70w

• w + 15 + 55

• 55 + 15w

A company sells a product for $8 per unit. The revenue function R(x) is given by R(x) = 8x, where x is the number of units sold. Find the revenue when 40 units are sold.

• 320

• 160

• 240

• 200

The monthly property tax, y, for a home, in dollars, in a certain city x years after 1990 can be found using the equation y = 550 + 24x. Which of theses staements is TRUE?

• The property tax increased $550 per year each year after 1990.

• The property tax increased $24 per year each year after 1990

• The property tax decreased $550 per year each year after 1990.

• The property tax decreased $24 per year each year after 1990.

The table shows the relationship between the number of tickets (t) and the total cost (c) for a concert. How many tickets can be purchased when c=120

• 8 tickets

• 7 tickets

• 18 tickets

• 15 tickets