SOLUTION: Graph and label the following function and describe the domain and range. f(x)=x^2-9

Algebra ->  Graphs -> SOLUTION: Graph and label the following function and describe the domain and range. f(x)=x^2-9      Log On


   

Question 668906: Graph and label the following function and describe the domain and range. f(x)=x^2-9
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
you are given:
f%28x%29=x%5E2-9...or...y=x%5E2-9
find roots
y=x%5E2-9......factor out
y=x%5E2-3%5E2
y=%28x-3%29%28x%2B3%29....set y=0
0=%28x-3%29%28x%2B3%29
solutions:
if %28x-3%29=0, then x=3
if %28x%2B3%29=0, then x=-3

graph:

+graph%28600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%28x-3%29%28x%2B3%29%29+

domain:

range: