Algebra Building Functions

Is this a function?

• Yes, one output for each input

• No, look at the -3's

• It depends

• Not enough information

2x + 3x

• 5x

• 6x

• cannot be simplified

• 5 + x

2x² + 3x² + 5x

• 10x

• 10x²

• 5x² + 5x

• 10x³

Is the following relation a function: (2, 3) (5, 10) (2, 3)

• yes because there is one output for each input

• no because 2 appears twice as an input

• not enough information

• it depends

What does the f in "f(x)" usually stand for?

• function

• fraction

• factor

• ****

What always goes inside the parentheses in "f(x)"?

• the output

• the input

• the y-value

• the answer

Evaluate f(2) when f(x) = x+3

• f(2) = 2

• f(2) = 3

• f(2) = 5

• f(2) = 6

Evaluate g(5) when g(x)=2x

• g(5) = 2

• g(5) = 5

• g(5) = 7

• g(5) = 10

Evaluate f(10) when f(x)=2x+1

• f(10) = 3

• f(10) = 10

• f(10) = 21

• f(10) = 30

Is this a function?

• Yes, one output for each input

• No, look at the 2's

• It depends

• Not enough information