Function Vocab
Evaluating Functions
Is it a Function?
Random Function Questions
100
True or False-A relation is a set of ordered pairs
What is TRUE?
100
Find y if x=3
2x - 1 = y
5
100
Is it a function? Explain. {(2, 3), (4, 5), ( -2, 6)}
YES because each x is paired with exactly one y?
100
Name 2 other names for x-values.
domain, input, or independent variable
(must have named 2)
200
What variable is used to represent the domain?
x
200
Find y if x = -1
y = 3x + 2
-1
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?
200
Name 3 other names for y-values.
range, output, dependent variable
300
What variable is used to represent the range?
y
300
Find y if x = -4
y = -2x + 1
9
300
Is it a function?
What is NO because it does not pass the Vertical Line Test?
300
Graph these points and decide if it is a function.
(1,2) (2,4) (3,6)
Function
400
A relation that assigns exactly one element in the domain to exactly one element in the range is called what?
A Function.
400
Given the points write a function rule (-1,-1); (0,1); (1,3);(2,5)
What is f(x)=2x+1?
400
Is it a function? Explain.
(-1,0) (0,0) (1,0) (2,0)
YES, each x is paired with one y.
400
Find the output if the input is 10.
y = 7x - 5
65
500
The test to tell if a graph is a function
What is the Vertical Line Test?
500
Find y if x = -2
y = 3 - x
5
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
500
Which number would be needed to make a function,
1, 2, or 3?
(2, 0) (4, 1) (3, 2) (_, 3)
1