Functions

Which of the following is a function?

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• 
• 
• 

Is the following a function?

• Yes, this is a function.

• No, it's not a function.

• Can't be determined with this information.

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

f(x) = 3x² - 11
Find f(-5)

• f(-5) = 64
• f(-5) = -86
• f(-5) = 214
• f(-5) = -7

Given f(x) = -4x - 10 and f(x) = 10. Find x

• x = -5

• x = 5

• x = -50

• x = 30

Evaluate for f(4)

• -3
• 0
• 4
• 7

Is this graph a function or not a function? 

• Function
• Not a Function

2X+5x+11=53

• x=6
• x=5
• x=-6
• x=64/7