Module 3 - Relations and Functions Review

The admission fee at a carnival is $9. Each ride costs $1.75. Let r represent the number of rides. Identify the dependent variable.

• Admission fee

• Total cost

• Number of rides

• Carnivals

The admission fee at a carnival is $9. Each ride costs $1.75. Let r represent the number of rides. Write a rule in function notation to fit this situation.

• f(r) = 9r + 1.75

• f(r) = 1.75r - 9

• f(r) = 1.75r + 9

• f(r) = 9r - 1.75

A relation where every input yields one and only one output is called what?

• Relation

• Linear

• Exponential

• Function

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)}

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 graph a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function

• Not a Function

Which mapping represents the relation {(-2, 4), (4, 2), (2, 4), -4, 2)}?

• A

• B

• C

• D

What is the definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Select all of the names the x-values can be called.

• Domain

• Function

• Input

• Independent Variable

• Range