Which statement best describes the graph of −x3 − x2 + 4x + 4?

For where n is the highest power of the function
if n is even and 'a' is positive, the graph goes from top left to top right
if n is even and 'a' is negative, the graph goes from bottom left to bottom right      
if n is odd and 'a' is positive, the graph goes from bottom left to top right           
if n is odd and 'a' is negative, the graph goes from top left to bottom right

and, for , it intersects the graph at , ,, up to ,

so see what we've got            
factor and group              
                                                                      a=-1               the roots are x=-2, x=-1, x=2                since n=3 (from ) and a is negative, we know it goes from top left to bottom right             also, it intersects at x=-2,-1, and 2

answer is the 3rd option: It starts up on the left and goes down on the right and intersects the x-axis at x = −2, −1, and 2.

Idon’t understand sorry

Where is the problems