Relations and Functions

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

• Function
• Not a Function 

Is this graph a function or not a function? 

• Function 
• Not a Function

• Function
• Not a Function

What is the test to determine if a graph represents a function?

• Horizontal line test

• Vertical line test

• Heidelberg Uncertainty Test

• Obi Wan Kenobi Test

• Function
• Not a Function

What is the Domain?

• {-3, -1, 1, 3, 5, 7, 9}
• {-3, -2, -1, 0, 1, 2, 3}
• -3 ≤ x ≤ 3
• -3 ≤ x ≤ 9

A vertical line is a function. True or False.

• True

• False

Why isn't a vertical line a function?

• A vertical line is not a function because for any y-value , the x value always changes.

• A vertical line is not a function because the x value always changes for any y- value.

• A vertical line is not a function because the x-value never changes for any y- value.

For the order pairs: ( 3, 8), ( 5, 4), (1, 9) , and (2, 7). List the domain.

• D: {4, 7, 8, 9}

• D: {1,2,3,5}

This is a function. True or False.

Hint: Use the vertical line test.

• True

• False