Function Vocab
Evaluating Function Rules
Writing Function Rules
Graphing
Is it a Function?
100
True or False-A relation is a set of ordered pairs
What is TRUE?
100
Evaluate f(x)=-3x if x=2
What is -6?
100
Given the points write a function rule (0,-2);(1,-1); (2,0)
What is y=x-2?
100
The point (0, 2) is in this quadrant
What is none because the point sits on the y-axis
100
Is it a function?
{(2, 3), (4, 5), ( -2, 6)}
What is YES because x does not repeat?
200
The set of first coordinates of a relation or a function
What is Domain?
200
Evaluate f(x)=2x+1 if x=-2
What is -3?
200
Given the points write a function rule (0,0); (1,3); (2,6)
What is y=3x?
200
Draw an example of an absolute value function.
What is a V shaped image on a graph?
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
This is a function that can be represented with a line on a graph.
What is a continuous function?
300
Evaluate f(x)=-3 - x if x=6
What is -9?
300
Given the points write a function rule (0,0); (2,1); (4,2)
What is y=x/2?
300
Which direction does the absolute value function point (up or down) when there is a negative slope?
What is the down?
300
Is it a function?
| x | y |
| 2 | 4 |
| 1 | 5 |
| 2 | 6 |
What is NO because x repeats?
400
A relation that assigns exactly one value in the range to each value in the domain?
What is a function?
400
Evaluate f(x)=25 + 4x if x=5
What is 45?
400
Given the points write a function rule (-1,-1); (0,1); (1,3);(2,5)
What is f(x)=2x+1?
400
Define a step function.
What is: A step function (or staircase function) is a piecewise function containing all constant "pieces". The constant pieces are observed across the adjacent intervals of the function, as they change value from one interval to the next. A step function is discontinuous (not continuous). You cannot draw a step function without removing your pencil from your paper.
400
Is it a function?
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What is YES because it passes the Vertical Line Test?
500
The test to tell if a graph is a function
What is the Vertical Line Test?
500
Evaluate f(x)=-(4x+2) if x=7
What is -30
500
Given the points write a function rule (0,5); (1,6); (2,7);(-1,4)
What is f(x)=x+5
500
Give two features of a parent function.
What are (any two accepted):
• Domain: All Reals (-∞,∞)
Unless domain is altered.
• Range: [0,∞)
• increasing (0, ∞)
• decreasing (-∞,0)
• positive (-∞, 0) U (0, -∞)
• absolute/relative min is 0
• no absolute max (graph → ∞)
• end behavior
f (x) → +∞, as x → +∞
f (x) → +∞, as x → -∞
500
Is it a function?
What is NO because it does not pass the Vertical Line Test?