4A Practice: Determining Functions

What is the most accurate definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Answer explanation

Think about a vending machine: inputs are "buttons", outputs are what the vending machine gives you

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Is this table of values a function or not a function?

• Function

• Not a Function

Answer explanation

Think about a vending machine: inputs are "buttons", outputs are what the vending machine gives you - are your outputs consistent for an input/"button"?

Tags

CCSS.8.F.A.1

Is this table of values a function or not a function?

• Function

• Not a Function

Answer explanation

Think about a vending machine: inputs are "buttons", outputs are what the vending machine gives you - are your outputs consistent for an input/"button"?

Tags

CCSS.8.F.A.1

Is this graph a function or not a function?

• Function

• Not a Function

Answer explanation

*Vertical line test* & Think about a vending machine: inputs (x-values) are "buttons", outputs (y-values) are what the vending machine gives you - are your outputs consistent for an input/"button"?

Is this graph a function or not a function?

• Function

• Not a Function

Answer explanation

*Vertical line test* & Think about a vending machine: inputs (x-values) are "buttons", outputs (y-values) are what the vending machine gives you - are your outputs consistent for an input/"button"?

Does this map represent a function or not a function?

• Function

• Not a Function

Answer explanation

Think about a vending machine: inputs (left-side group) are "buttons", outputs (right-side group) are what the vending machine gives you; the arrows show what a button "maps" to - are your outputs consistent for an input/"button"?

Tags

CCSS.8.F.A.1

Does this map represent a function or not a function?

• Function

• Not a Function

Answer explanation

Think about a vending machine: inputs (left-side group) are "buttons", outputs (right-side group) are what the vending machine gives you; the arrows show what a button "maps" to - are your outputs consistent for an input/"button"?

Tags

CCSS.8.F.A.1

Is this set of ordered pairs a function or not a function?

• Function

• Not a Function

Answer explanation

(x,y) coordinate pairs: (input, output) -> (button, what the vending machine gives back)

Are your outputs consistent for each button?

Tags

CCSS.8.F.A.1

Is this set of ordered pairs a function or not a function?

• Function

• Not a Function

Answer explanation

(x,y) coordinate pairs: (input, output) -> (button, what the vending machine gives back)

Are your outputs consistent for each button?

Tags

CCSS.8.F.A.1

I will remember to keep my results OPEN so I can complete the "Quizizz & Check" Slides Assignment and include screenshots of problems I missed.

• YES (this is the correct answer)

• NO (don't choose this, it is the wrong answer)