CCSS.Math.Content.8.F.A.1

What does the graph of y =7 look like?

• A horizontal line 7 units below the x-axis.
• A vertical line 7 units to the right of the y-axis.
• A vertical line 7 units to the left of the y-axis.
• A horizontal line 7 units above the x-axis

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CCSS.Math.Content.8.F.A.1

Name the parent function.

• cube root
• square root
• cubic
• squiggly

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CCSS.Math.Content.8.F.A.1

X-values cannot repeat in a function.

• True
• False

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CCSS.Math.Content.8.F.A.1

Does this mapping represent a function? Why or why not?

• Yes, this is a function because all the x values are different.
• No, this is not a function because not all the x values are different.
• Yes, this is a function because all the y values are different.
• No, this is not a function because not all the y values are different. 

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CCSS.Math.Content.8.F.A.1

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

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CCSS.Math.Content.8.F.A.1

f(x) = x²+9
g(x) = x-9
Find f(x)-g(x). 

• x²+x+9
• x²-x+9
• x²-x
• x²-x+18

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CCSS.Math.Content.8.F.A.1

The total cost in dollars, c, to purchase video games online can be found using the function c = 16.95x + 4.75, where x is the number of video games purchased.  If at least 4 games but no more than 7 games are purchased online, what is the range of the function for this situation?

• {4, 5, 6, 7}
• 4 ≤ x ≤ 7
• 72.55 ≤ c ≤ 123.50
• {72.55, 89.50, 106.45, 123.40}

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CCSS.Math.Content.8.F.A.1

Which of the following relations represents y as a function of x?
I. {(1, 4), (2, 5), (3, 6)}
II. {(1, 4), (2, 4), (3, 4)}
III. {(1, 4), (2, 4), (1, 3)}
IV. {(1, 4), (1, 2), (1, 3)}

• I, II, and III only
• II and IV only
• III and IV only
• I and II only

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CCSS.Math.Content.8.F.A.1

Is this table a function and how can you tell?

• Yes its a function because there are not variables for missing numbers

• No it's not a function because the y value 4 repeated

• No it isn't a function because the x value 2 is repeated

• No it's not a function because the x value 5 has 2 outputs.

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CCSS.Math.Content.8.F.A.1

Is the graph of y = -2 horizontal, vertical or neither?

• horizontal

• vertical

• neither, it is diagonal.

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CCSS.Math.Content.8.F.A.1