Linear Relationships

The graph shows the cost of a personal pizza (y) vs. the number of toppings (x). Which equation best describes the relationship above?

• y = 2x

• y = 2x + 4

• y = 4x

• y = 2x + 2

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Which graph correctly displays the data from the table?

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Tags

CCSS.8.EE.B.5

An electrician charges $25 to make a house call, plus $40 for every hour of work. Which equation shows how to find C, the total cost for having the electrician work for h hours?

• C = 25 + 40h

• C = 65 + h

• C= 65h

• C = 25h + 40

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Which of the following situations could be described by the equation y = 120 - 25x ?

• 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

Which equation best matches the graph shown?

• y = 4x

• y = 4x - 3

• y = 4/3 x + 4

• y = 4/3 x - 3

The graph shows the relationship between the number of hours a paddleboat is rented and the total cost of the rental. Write and equation for the relationship, then use the equation to predict how much it would cost to rent a paddleboat for 5.5 hours.

• x = 20y + 30; $140

• y = 30x + 20; $100

• y = 20x -30; $150

• y = 20x + 30; $140

Tags

CCSS.8.EE.B.5

What is the equation that best represents the graph above?

• y = 2/3x + 5

• y = - 2/3x +5

• y = 2/3x - 5

• y = - 2/3x - 5

Write the equation that best matches the graph shown.

• y = 4x

• y = 4x - 3

• y = 4/3 x + 4

• y = 4/3 x - 3

Clare owns a mobile pet grooming company. She charges $20 to come to your home plus $30 per hour to groom your pet. Which equation models the amount she charges over time?

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Franklin's faucet was leaking water, so he put a bucket underneath to catch the water. After a while, Franklin started keeping track of how much water was leaking. His data is shown in the table. 
Find the equation Franklin can use for his leaky faucet.

• y = 1.5x + 2

• y = 2x + 1.5

• y = 2x

• y = 1.5x

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2