Function Vocabulary
Evaluating Functions
Types of slopes
Finding Slope
Is it a Function?
100
Another word for input is.
Domain
100
Evaluate f(x)=-3x if x=2
-6
100
A line that is increasing from left to right has a ___________ slope
Positive
100
Find the slope of the line passing through the points (–2, 3) and (–8, –7) .
5/3
100
Is it a function? {(2, 3), (4, 5), ( -2, 6)}
YES because every input (x) has exactly one output (y).
200
The set of all x-values or inputs of a function.
DOMAIN
200
Evaluate f(x)=2x+1 if x=-2
-3
200
This graph has a slope of _____________
Zero (0)
200
Which expression represents a line with a positive slope?
200
Using the vertical line test does the graph of the points (1,3) and (1,5) represent a function?
False, the points fail the vertical line test. (A vertical line touches more than one point.)
300
The set of all y-values or outputs in a function
RANGE
300
Evaluate f(x)=-3 - x if x=6
-9
300
What kind of slope is this?
Undefined
300
What is the slope of the line passing through the points A and B, as shown on the graph below?
- 1/3
300
Is it a function?
| x | y |
| 2 | 4 |
| 1 | 5 |
| 2 | 6 |
NO; the x-value of 2 has two y-values (4 and 6).
400
The test to tell if a graphed relation is a function
VERTICAL LINE TEST
400
Evaluate f(x)=20 - 8x if x=5
-20
400
What type of slope is this?
negative
400
What is the slope of the linear equation 5y − 10x = −15?
Remember y=mx+b
Slope=2
400
Is it a function? 
YES! Passes the Vertical Line Test! Every x-value has only one y-value.
500
Draw a coordinate plane and label each quadrant correctly.
See Whiteboard.
500
Evaluate f(x)= xˆ2 + 5x - 8 if x=7
76
500
Name one of the slope formulas.
500
Is it a function? 
NO; it does not pass the Vertical Line Test, for example x = -2 has two y-values.