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A biologist created the following graph to show the relationship between the temperature of water (x), in degrees Celsius, and the number of insect larvae (y) in the water:
graph of y equals minus 2 times the square of x plus 20 times x plus 400
What do the x-intercepts of the graph represent?
There were 20 larvae at 0 degrees Celsius.
There were 10 larvae at 0 degrees Celsius.
The water has no larvae at -10 degrees Celsius and 20 degrees Celsius.
The water has maximum larvae at -10 degrees Celsius and 20 degrees Celsius.

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@Mehek14

\(\large \color{black}{\begin{align}
y=-2x^{2}+20x+400\hspace{.33em}\\~\\
\end{align}}\)

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