Function 1

Is this mapping a function or not a function? 

• Function
• Not a Function 

Is the relation a function? 
{(4,5), (4,-7), (4,2), (4,0), (4,9)}

• Yes
• No

Is this table a function or not a function? 

• Function
• Not a Function

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.

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

• 0
• -3
• 3
• -1

Evaluate f(-2) if f(x) = x²+ 3.

• -1
• 1
• 7
• -7

Solve for f(5):
f(5) = -x + 4

• 9 
• 1
• -1
• -9

Is this a function?

• Yes

• No

• Let me ask my dog...

• Why are there letters in math?

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)

Is this set of ordered pairs a function or not a function? 

• Function
• Not a Function