Function Vocab
Evaluating Functions
Function Operations
Function Compositions
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
g(n) = n2+ 4 + 2n
h(n) = −3n + 2
Find (g ⋅ h)(1)
-7
100
f(x)=9-x g(x)=x2+x h(x)=x-2
f(g(-8))=
-47
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)=25 + 4x if x=5
What is 45?
200
f (x) = 4x − 3
g(x) = x3+ 2x
Find ( f − g)(4)
-59
200
f(x)=9-x g(x)=x2+x h(x)=x-2
g(f(3))=
40
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
The set of second coordinates in a relation or a function
What is the range?
300
Evaluate f(x)=-(4x+2) if x=7
What is -30
300
h(x) = 3x + 3
g(x) = −4x + 1
Find (h + g)(10)
-6
300
f(x)=9-x g(x)=x2+x h(x)=x-2
h(g(-4))=
10
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
k(x) = −3x2− 3 Find k(−2)
-15
400
g(x) = 2x − 5
h(x) = 4x + 5
Find g(3) − h(3)
-16
400
f(x)=9-x g(x)=x2+x h(x)=x-2
f(g(h(6)))=
-11
400
Is it a function?
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
h(t) = t3+ 5t2
Find h(2)
28
500
g(a) = 3a + 2
f (a) = 2a − 4
Find (g/f)(3)
11/2
500
You want to purchase a $30 jacket. It is on sale for 20% off. After the discount you need to consider that the sales tax is 7%. How much are you paying for the jacket?
$25.68
500
Is it a function? 
What is NO because it does not pass the Vertical Line Test?