Step 1:
Enter the equation into Y= 
Step 2:
Hit GRAPH. Be sure the
graph is viewable in the graphing window. Adjust the
WINDOW if needed. 
Step 3:
From the HOME screen, hit the MATH key.
Choose either #6 fMin or
#7 fMax.
Hit ENTER. 
Step 4:
The parameters for fMin
and fMax the same:
fMin(expression, variable, left
bound, right bound)
Be careful: The
answer from fMin is the Xcoordinate
where the minimum occurs. It is not the actual yvalue
minimum. You must then calculate the yvalue. 
Step 5:
Again, remember that the answer from
fMax is the Xcoordinate where the maximum
occurs. You must then calculate the yvalue.
HINT: To get
Y_{1}(Ans):
Y_{1}: VARS > YVARS 
#1Function
Ans: 2nd () key 

ANSWERS:
Min(5.070,
7.759)
Max(.263, 6.129) 