Evaluating Linear Functions

The video tutorial introduces function notation, emphasizing its importance in algebra. It uses a vending machine analogy to explain how functions work, where inputs are processed to produce outputs. The tutorial demonstrates evaluating functions with various inputs and provides practice examples to reinforce understanding.

Why is function notation important?

• It is only used in calculus.

• It is not important at all.

• It is only used in geometry.

• It is used in algebra and beyond.

Tags

CCSS.HSF.IF.A.1

CCSS.8.F.A.1

What is a function machine compared to in the video?

• A washing machine

• A computer

• A calculator

• A vending machine

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

How do you read 'f(x)'?

• f of x

• f times x

• f plus x

• f divided by x

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

What is the output when x is -2 in the function f(x) = 3x?

• 3

• 0

• -6

• 6

Tags

CCSS.HSF.IF.A.2

What is the output when x is 0 in the function f(x) = 3x?

• 6

• -3

• 3

• 0

Tags

CCSS.HSF.IF.A.2

What is the output when x is 5 in the function f(x) = 3x?

• 10

• 15

• 5

• 20

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

In the function f(x) = 2x - 3, what is the output when x is 3?

• 3

• 6

• 0

• 9

Tags

CCSS.HSF.IF.A.1

CCSS.8.F.A.1

In the function g(x) = -x - 9, what is the output when x is 11?

• -20

• -11

• 0

• 2

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

In the function h(x) = x + 1, what is the output when x is 2?

• 3

• 2

• 4

• 1

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

What should you do every time you see an x in f(x) when evaluating a function?

• Replace it with the input value

• Multiply it by 2

• Divide it by 2

• Ignore it

Tags

CCSS.HSF.IF.A.2