Algebra 1 Keystone

The table represents a function of x.

Which equation describes the function?

• y = -2x + 12

• y = -2x + 24

• y = 2x + 12

• y = 2x + 24

A pizza restaurant charges for pizzas and adds a delivery fee. The cost (x), in dollars, to have any number of pizzas (p) delivered to a home is described by the function c = 8p + 3. Which statement is true?

• The cost of 8 pizzas is $11.

• The cost of 3 pizzas is $14.

• Each pizza costs $8 and the delivery fee is $3.

• Each pizza costs $3 and the delivery fee is $8.

At the beginning of a road trip, there are 14,000 miles on Denny's car. During the trip, Denny drives his car at an average speed of 55 miles per hour. Which graph best shows the total number of miles (y) on the car as a function of the number of hours (x) Denny drives at 55 miles per hours?

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Aki wants to buy a music player that costs $234 using only the money he earned from mowing lawns. The table shows the amount of money Aki earned as a function of the number of lawns he mowed. Based on the function shown in the table, what is the LEAST number of lawns Aki will have to mow to buy the music player?

• 22

• 29

• 30

• 31

Is this relation a function?

{(4, 5), (-3, 2), (5, 5), (2, -3)}

• Yes, because there is exactly one x-value for every y-value

• Yes, because there is exactly one y-value for every x-value

• No, because there is more than one x-value for some y-values

• No, because there is more than one y-value for every x-value

Which of following does NOT represent a function of x?

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Which inequality represents the range of the relation graphed?

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Which ordered pair (x, y) makes the relation below a function?

• (-4, 0)

• (-2, 0)

• (2, 0)

• (4, 0)

Identify the slope and y-intercept of:
y = 1/5x + 5

• slope: 1/6   y-intercept:  4 

• slope: 1/5   y-intercept:  5 

• slope: 5/1   y-intercept:  5 

• slope: 1   y-intercept:  5