Linear Equations

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

The table represents which of the following equations?

• y = 6x

• y = x + 2

• y = 2x + 4

• y = x + 5

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 graph shows the equation y = -1/2x + 5

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Which table shows the relationship represented by the graph?

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Which graph correctly displays the data from the table?

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Pierre sells homecoming mums for $10, plus and additional $0.75 per decoration added. Which table shows the relationship between the total cost of the mum (C) and the number of decorations (d)?

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Which of the following equations best represents the relationship between x and y?

• y = 2x + 4

• y = 2x - 4

• y = 4x + 2

• y = 4x - 2

Based on the information in the table, which equation can be used to represent the relationship?

• y = 8x

• y = 5x + 5

• y = 5x + 15

• y = 5x + 40

Which situation is best described by the graph shown?

• JJ purchases chips for $0.75 per bag.

• Mark buys packs of gum for $1.50 each.

• Paula pays $0.50 per ticket at the fair.

• Franco purchases flowers for $3.00 each.