Is it a Function? & Describe Graphs

Front

What is a function?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Tags

CCSS.8.F.A.1

Front

What is the vertical line test?

Back

The vertical line test is a method to determine if a graph represents a function. If a vertical line intersects the graph at more than one point, it is not a function.

Front

Is the following relation a function? {(1, 2), (2, 3), (1, 4)}

Back

Not a Function (the input 1 has two different outputs: 2 and 4).

Tags

CCSS.8.F.A.1

Front

Is the following relation a function? {(1, 2), (2, 3), (3, 4)}

Back

Function (each input has a unique output).

Tags

CCSS.8.F.A.1

Front

What does it mean for a graph to be a function?

Back

A graph is a function if every x-value has only one corresponding y-value.

Front

Which of the following is NOT a function? {(1, 2), (2, 3), (3, 3)}

Back

Function (all inputs have unique outputs).

Tags

CCSS.8.F.A.1

Front

Which of the following is a function? {(1, 2), (1, 3), (2, 4)}

Back

Not a Function (the input 1 has two different outputs: 2 and 3).

Tags

CCSS.8.F.A.1

Front

What is an example of a function in real life?

Back

A vending machine is a function; each button (input) gives one specific snack (output).

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Front

What is the definition of a relation?

Back

A relation is a set of ordered pairs, where each pair consists of an input and an output.

Tags

CCSS.8.F.A.1

Front

How can you tell if a graph is a function using the vertical line test?

Back

If any vertical line drawn on the graph intersects it at more than one point, then it is not a function.