Vocabulary
Domain & Range
Is it a Function?
100
What is the definition of domain?
A set of input values (all values of x).
100
State the domain and range:
| x | y |
| 3 | 7 |
| 5 | 9 |
| 3 | 8 |
D: {3, 5}
R: {7, 8, 9}
100
Is it a function? Justify your answer.
{(2, 3), (4, 5), ( -2, 6)}
Yes, each input has exactly one output.
200
What is the definition of range?
The set of output values (all values of y).
200
State the domain and range:
D: {1, 2, 3, 4, 5, 6}
R: {-1, 0, 1, 2, 3, 6}
200
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.
300
What is the definition of a function?
A relationship between input and output values. Each input has exactly one output value.
300
State the domain and range: {(0.3, 0.6), (0.4, 0.8), (0.3, 0.7), (0.5, 0.5)}
D: {0.3,0.4,0.5} R:{0.6,0.8,0.7,0.5}
300
Is it a function? Justify your answer.
| x | y |
| 2 | 4 |
| 1 | 5 |
| 2 | 6 |
No, the input of 2 has two different outputs.
400
What is the definition of an inverse of a function
When your input becomes your output and your output becomes your input.
400
State the domain and range: {(5, –4), (3, –5), (4, –3), (6, 4)}
D: {5,3,4,6} R:{-4,-5,-3,4}
400
Is it a function? Justify your answer.
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Yes, it passes the Vertical Line Test.
500
What is the test to tell if a graph is a function?
Vertical Line Test
500
State the domain and range: {(0, 0.4), (1, 0.8), (2, 1.2), (3, 1.6)}
D: {0,1,2,3} R:{0.4,0.8,1.2,1.6}
500
Is it a function? Justify your answer.
Yes, each input has exactly one output.