Download Recognizing Different Functions

Recognizing Different Functions

A function is an equation usually written
like:

It is similar to saying y =
◦ There are differences but I’m not going to get
into it here!

1.
2.
3.
There are three different functions you
need to know:
Linear
Quadratic
Exponential

Linear: a linear equation either in
standard form or slope-intercept form
◦ Only has one x in equation (not squared)

Quadratic: a function that has an x2
value
◦ The graph will create a loop up or down

Exponential: where the exponent is a
variable
◦ Ex: 3x

You’re going to have to determine if an
equation is linear, quadratic, or
exponential two ways
◦ The first way is by looking at a graph
◦ The second way in with a chart

Linear
x
1
2
3
4
5
y
-2
0
2
4
6

Linear
Quadratic
 Ex: x2 + 2x + 4

x
1
2
3
4
5
y
2
0
2
4
8
Quadratic
 Makes a loop


Exponential
x
1
2
3
4
5
y
1
1.5
3
10
22

Exponential
x
1
2
3
4
5
y
28
14
7
3.5
1.75

Exponential

Exponential