3.3Graph Square Root Functions

3.1, 3.3 Test: May 4

Computer Lab (C32): May 5

Vocabulary

• A radical expression is an expression that contains a radical, such as a square root, cube root, or other root.

• A radical function contains a radical expression with the independent variable in the radicand.– Example: ( )f x x

Vocabulary• If the radical is a square

root, then the function is called a square root function.

• The most basic square root function in the family of all square root functions, called the parent square root function, is y x

Remember!!!

• Can we have a negative underneath the square root?????

NO

4

Example 1:Graph y = 5 x. And compare it to the parent

function y = x.

X

Y

Example 2: 1

Graph y = . Compare with the parent function 2

y = x.

x

X

Y

Example 3: Graph y = x 2. Compare to the parent function

y = x.

X

Y

Homework:

• p. 138 #1-21odd