HELP!!!! I WILL GIVE MEDALS!
The change in water vapor in a cloud is modeled by a polynomial function, C(x). Describe how to find the x-intercepts of C(x) and how to construct a rough graph of C(x) so that the meteorologist can predict when there will be no change in the water vapor. You may create a sample polynomial to be used in your explanations.

Question

anonymous · Answer

I already have: 
To find the x-intercept of C(x), we start by setting the equation ( C(x) ) to be equal to zero and then we solve for x. This can also be applied to any polynomial to find the x-intercept". 

But I don't get how to answer the second part where it asks "how to construct a rough graph."

anonymous · Answer

Say you have a polynomial like 4x^4-3x^3+7x^-9x+14.  There first thing you want to find is where the polynomial crosses the x axis (so look at all the values in front of the x terms; 4, -3, 7, and -9.  Those are your x intercepts.  Your y intercept is the number without the x.  So in this case 14.  All you have to do now is plot those points and connect the dotes.  Also, because this is an even degree polynomial, the end behavior with be complex.