Review of Functions

Function Vocab

100

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

What is TRUE?

200

What variable is used to represent the domain? 

x

300

What variable is used to represent the range? 

y

400

A relation that assigns exactly one element in the domain to exactly one element in the range is called what?

A Function.

500

The test to tell if a graph is a function

What is the Vertical Line Test?

Evaluating Functions

100

Find y if x=3

2x - 1 = y

5

200

Find y if x = -1

y = 3x + 2 

-1

300

Find y if x = -4

y = -2x + 1 

9

400

Given the points write a function rule (-1,-1); (0,1); (1,3);(2,5)

What is f(x)=2x+1?

500

Find y if x = -2

y = 3 - x 

5

Is it a Function?

100

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

YES because each x is paired with exactly one y?

200

Is it a function? Explain. 

x	y
2	4
1	5
2	6

NO because the domain value 2 is paired with 4 and 6?

300

Is it a function?

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

400

Is it a function? Explain. 

(-1,0) (0,0) (1,0) (2,0)

YES, each x is paired with one y. 

500

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

No, the points fail the vertical line test

Random Function Questions

100

Name 2 other names for x-values. 

domain, input, or independent variable

(must have named 2)

200

Name 3 other names for y-values. 

range, output, dependent variable

300

Graph these points and decide if it is a function. 

(1,2) (2,4) (3,6)

Function

400

Find the output if the input is 10.

y = 7x - 5 

65

500

Which number would be needed to make a function, 

1, 2, or 3? 

(2, 0) (4, 1) (3, 2) (_, 3)

1