6-10) For the function f(x)= x³ +2x²-x-2:
Use the Leading Coefficient Test to determine the graph's end behavior;
Find the x-intercepts, and whether the graph crosses the x-axis or touches the x-axis
and turns around for each intercept;
Find the y-intercept;
Determine whether the graph has y-axis symmetry, origin symmetry, or neither,
Create the graph of the function, and use the maximum number of turning points to
check whether it is drawn correctly.
