Review of Functions

Function Vocab

100

True or False-A relation is a set of ordered pairs

What is TRUE?

200

The set of first coordinates of a relation or a function

What is Domain?

300

The set of second coordinates in a relation or a function

What is the range?

400

A relation that assigns exactly one value in the range to each value in the domain?

What is a function?

500

The test to tell if a graph is a function

What is the Vertical Line Test?

Evaluating Function Rules

100

Evaluate f(x)=-3x if x=2

What is -6?

200

Evaluate f(x)=2x+1 if x=-2

What is -3?

300

Evaluate f(x)=-3 - x if x=6

What is -9?

400

Evaluate f(x)=25 + 4x if x=5

What is 45?

500

Evaluate f(x)=-(4x+2) if x=7

What is -30

Random:

100

What is the domain and range?

y=2x+4

What is Range: all real numbers

Domain: all real numbers

200

State the range of the following relation.

What is {1, 2, 3, 4, 5}

300

Give the domain and range of the following function.

Domain: all real numbers

Range: -1 to infinity

400

Kim burns 34 calories per hour hiking. Write a function to describe this situation. WRITE IN FUNCTION NOTATION. Identify the independent and dependent variables.

f(h)=34h

Dependent: calories burned

Independent: hours spent hiking

500

 find the value of f(x) when x=0 in the function                          -x^2 +4x -1

What is F(0)=-1

Is it a Function?

100

Is it a function? {(2, 3), (4, 5), ( -2, 6)}

What is YES because x does not repeat?

200

Using the vertical line test does the graph of the points (1,3) and (1,5) represent a function?

What is False, the points fail the vertical line test

300

Is it a function?

x	y
2	4
1	5
2	6

What is NO because x repeats?

400

Is it a function?

What is YES because it passes the Vertical Line Test?

500

Is it a function?

What is NO because it does not pass the Vertical Line Test?