Function Practice(3/12/25)

What is the definition of a function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Is this table a function or not a function? 

• Function
• Not a Function

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

• -1
• 1
• 5
• -5

How would you write y = 2x - 3 in function notation?

• y = 2x-3

• f = 2x - 3

• f(x) = 2x - 3

• Can't be written in function notation

How do you read f(x)?

• "f x"

• "f of x"

• "f parenthesis x"

• "f with an x inside parenthesis"

How would you write y = 2x - 3 in function notation?

• y = 2x-3

• f = 2x - 3

• f(x) = 2x - 3

• Can't be written in function notation

Find f(2)

• 5

• 4

• 3

• 0

Which of these tables represent a function?

• A

• B

• C

• D

• all of the above