Function Notation
Multiple Functions
Graph Relations
Graphs
Review
100
f(x) = 3x+9
Find f(3)
f(3)=3(3)+9
18
100
f(x)=-7x+1
g(x)= 4x-9
Find f(-3) and g(-3)
f(-3)=-7(-3)+1= 21+1 = 22
g(-3)= 4(-3)-9= -12-9= -21
100
Is this a function?
Yes
100
Which point could be used to find
f(-2)
C
100
Is the following an arithmetic or geometric sequence?
4,7,10, ...
Arithmetic
200
If f(x) = -x - 4
Find f(-2)
f(-2) = -2
200
g(x)=2x+5
h(x)=5-2x
f(x)=5x-2
Find h(2) and g(9)
h(2)=5(2)-2= 10-2= 8
g(9)= 2(9)+5 = 18+5= 23
200
Is this a function? Why or why not?
Yes. Passes the vertical line test
200
What is the value of
f(1)
-2
200
Is the following arithmetic, geometric, or neither?
4, 8, 16
Geometric
300
If
f(x)=x^2 -5
Find f(3)
f(3) = 4
300
f(x)=x2
h(x)=3x-5
g(x)=x-11
Find g(20)
g(20)=20-11=9
300
Is this a function?
No! Does not pass the vertical line test.
300
What is the value of
f(4)
3
300
Is the following arithmetic or geometric? If so, state the common difference/ratio
1, -3, 9
Geometric
r = -3
400
If
f(x)=x^2 +3x+2
Find f(-1)
f(-1) = 0
400
g(x)=4x+8
f(x)=2x
Find f(3) and g(-2)
f(3)= 6
g(-2)= 0
400
Is this a function?
Yes, because it passes the vertical line test.
400
What is the value of
f(2)
3
400
Is the following arithmetic, geometric, or neither? If either of the first 2, name the common difference/ratio
15, 10, 5, ...
Arithmetic
common difference, d = -5
500
If
f(x)=x^3 +x^2-5x+6
Find f(-3)
f(-3) = 3
500
f(x)=6x+1
g(x)=2x-2
Find f(3)
Find g(-4)
f(3) = 19
g(-4) = -10
500
Is the following relation a function?
NO! There are two y-values at x = 2
500
What is the value of
f(3)
Undefined
500
Is the following arithmetic, geometric, or neither? If so, state the common difference/ratio
64, 16, 4, ...
Geometric
r = 1/4 or .25