Unit 7 Review (Math 8)

How can I identify a function?

• Always linear

• One input for every output

• One output for every input

• Never linear

Which set of ordered pairs in a function?

• (2, 1), (3, 4), (2,0)(4, 2)(10, 5)

• (1, 2)(2, 4), (3, 1), (4, 2),(6,7)

• (4, -3), (-4, -3), (4, 2), (9, 0), (8, -9)

• (3, 9), (3, 10), (3, 2), (3, 12), (3, 5)

What does f(6) represent?

• The function f of the input 6

• Multiplication of f and 6

• The function of the output 6

• The function of the output of y

Evaluate the function g(h) = 3h – 5 if h is 10?

• 10

• 15

• 20

• 25

Which table does not represent a function? Select all that apply.

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How do I know that the ordered pairs in a table represent a function?

• The numbers become smaller.

• The numbers become larger.

• y 𝑤𝑖𝑙𝑙 𝑛𝑜𝑡 𝑟𝑒𝑝𝑒𝑎t

• 𝑥 𝑤𝑖𝑙𝑙 𝑛𝑜𝑡 𝑟𝑒𝑝𝑒𝑎t

How can you determine if a graph is a function?

• It will be linear only.

• It will have a zero slope.

• A vertical line drawn anywhere on the graph will cross the graph only once.

• It will be an undefined slope.

Which graph does not represent a function?

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Which equation would NOT represent a function?

• y = 3x+2

• y^2 = 2x -1

• y=5x+6

• y = x^3 - 1

When using substitution with an equation, how do you know that the equation is not a function?

• The y value will repeat

• The negative numbers will not match the positive numbers

• The x value will repeat

• The coefficient will be a fraction