Calculate Menu
Press 
to view the calculate menu.
Press the number associated with an option or use the cursor
keys to select an option and press 
.
Press 
to select value
which evaluates a function for a given value of x.
Press 
to select zero
which finds an x intercept.
Press 
to select minimum
which finds a relative minimum.
Press 
to select maximum
which finds a relative maximum.
Press 
to select intersect
which finds a point of intersection.
Press 
to select dy/dx which finds the derivative of a function.
Press 
to select 
which finds the value of the integral of a function.