The following table shows the assets and liabilities of the chang family in 2007 and 2008.

2007
2008
home valued at $315,000
home valued at $325,000
mortgage of $265,000
mortgage of $240,000
car valued at $10,000
car valued at $6,000
car loan of $5,000
car loan of $1,000
savings of $2,000
credit card debt of $1,500

The change in water level of a lake is modeled by a polynomial function, w(x). described how to find the x-intercepts of w(x) and how to construct a rough graph of w(x) so that the parks department can predict when there will be no chage in the water level. you may create a sample polynomial of degree 3 or higher to use in your explanations.