The change in water level of a lake is modeled by a polynomial function, W(x). Describe 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 change in the water level. You may create a sample polynomial to be used in your explanations.

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anonymous · Answer

if water change = W(x), that means that we are trying to find when there is no water change. So when water change = 0. Which mea|dw:1386389354718:dw|ns W(x) = 0. So we set y = W(x) to 0. and solve for x. Since water change is dependent on time, and time can't be negative we would not include an negative values that we might get.