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What is the definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

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.

Is this graph a function or not a function? 

• Function 
• Not a Function

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

Evaluate f(-2) if f(x) = x²+ 3

• -1
• 1
• 7
• -7

For the function f(x) = -3(x-1) find f(0).

• 0
• -3
• 3
• -1

• 0

• 1

• -3

• 3

• 1

• -1

• 6

• -6

• subtract 8
• divide 7
• x=3
• add 8
• multiply 7
• subtract 7
• x=2
• x=5.2
• x=7
• divide 8

Place the steps to the equation in order.

• 3x = -3

• x = -1

• 3x - 2 = -5