Relations vs. Functions

The plane containing the x-axis and the y-axis is the...

• grid system

• coordinate system

• ordered pair

• coordinate plane

The first number in an ordered pair is...

• the larger number.

• the origin.

• the x-coordinate.

• the y-coordinate.

The point where the two axes intersect in known as...

• the center.

• the relation.

• the intersection.

• the origin.

Which relation is NOT a function?

• {(1,-5), (3,1), (-5,4), (4,-2)}
• {(2,7), (3,7), (4,7), (5,8)}
• {(1,-5), (-1,6), (1,5), (6,-3)}
• {(3,-2), (5,-6), (7,7), (8,8)}

Which of the following is not a function?

• {(0,1), (1,2), (2,3), (3,4)}
• {(0,2), (1,3), (4,3), (1,2)}
• {(1,3), (4,2), (2,0), (3,4)}
• {(1,2), (2,2), (3,2), (4,2)}

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

Is this a function? 

• Yes
• No

Is this mapping 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