Function Vocab
Function Rules Table
Is it a Function?
Function Rule Scenario
100
True or False-A relation is a set of ordered pairs
TRUE
100
Given the points write a function rule (0,-2);(1,-1); (2,0)
y=x-2
100
Is it a function? {(2, 3), (4, 5), ( -2, 6), (2, 3)}
YES
100
George has $100 and plans to save another $20 per week. Write the function rule
y=20x+100
200
The set of first coordinates of a relation or a function (set of x-values)
Domain
200
Given the points write a function rule
(0,0)
(1,3)
(2,6)
y=3x
200
Using the vertical line test does the graph of the points (1,3) and (1,5) represent a function?
Not a function
200
George makes $20 per hour at his job. Write a function rule to represent his money over time.
y = 20x
300
The set of second coordinates in a relation or a function (set of y-values)
Range
300
Given the points write a function rule
(0,0)
(2,1)
(4,2)
y=1/2x
300
Is it a function?
| x | y |
| 2 | 4 |
| 1 | 5 |
| 2 | 6 |
NO
300
RANDOM: How old is Mr. Dodge?
31
400
A function is a relation where each input has ____ output.
1
400
Given the points write a function rule
(-1,-1)
(0,1)
(1,3)
(2,5)
y=2x+1
400
Is it a function?
y= -3x + 4.1
YES
400
George has $200 and is spending $15 per week. Write a function rule to represent his savings over time.
y = -15x + 200
500
The test to tell if a graph is a function
Vertical Line Test
500
Given the points write a function rule
(1,6)
(2,7)
(3,8)
y=x+5
500
Is it a function?
What is NO because it does not pass the Vertical Line Test?
500
George's gas tank in his car fits 17 gallons. Each day he uses 0.5 gallons. Write a function rule to represent the gas in his car.
y = -0.5x +17