Introduction to Functions

Is the graph a function?

• No
• Yes

Is this mapping a function or not a function? 

• Function
• Not a Function

Evaluate f(-2) if f(x) = x+3

• -1
• 1
• 5
• -5

Evaluate f(x)=-2x+13   for f(10)

• -7
• 1
• -8
• 7

Which graph does NOT pass the vertical line test?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

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)

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

f(x)=4x+5
f(4)=

• 21
• -11
• -31
• 25

Evaluate for f(2)

• -3
• 0
• 4
• 7

Is this is a function or not a function?

• Function
• Not a Function