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Find all local maximum and minimums of the graph. Approximate as needed.
The graph will have local maximum if it changes from increasing to decreasing and a local minimum if it changes from decreasing to increaing. The graph has local maximums at \(\displaystyle (4, 8)\) and \(\displaystyle (-5.4,12.2)\). The graph has a local minimum at \(\displaystyle (-1, -4)\).
\begin{tikzpicture}[scale=.4, font=\Large]
\draw[very thick, color=blue, opacity=0.3, xstep=1, ystep=1] (-10,-10) grid (10,13);
\draw[latex-latex, very thick] (-10.4,0)--(10.4,0) node[right]{$x$};
\draw[latex-latex, very thick] (0,-10.4)--(0,13.4) node[above]{$y$};
\foreach \x in { -10,-8,...,10 }{
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}
\draw[thick, color=blue, domain={-10.0}:{-1.0}, color=red, very thick,latex-, samples =350] plot(\x, {-61*(\x)^2/72 - 655*(\x)/72 - 49/4});
\draw[very thick, color=red,-latex] (-1, -4) -- (4, 8) --(10, 6);
\end{tikzpicture}
\begin{question}Find all local maximum and minimums of the graph. Approximate as needed.\newline\begin{tikzpicture}[scale=.4, font=\Large]
\draw[very thick, color=blue, opacity=0.3, xstep=1, ystep=1] (-10,-10) grid (10,13);
\draw[latex-latex, very thick] (-10.4,0)--(10.4,0) node[right]{$x$};
\draw[latex-latex, very thick] (0,-10.4)--(0,13.4) node[above]{$y$};
\foreach \x in { -10,-8,...,10 }{
\pgfmathsetmacro{\xtick}{\x != 0 ? "\x" : ""}
\draw (\x, .2) -- (\x,-.2) node[below]{$\xtick$};
}
\foreach \y in { -10,-8,...,13 }{
\pgfmathsetmacro{\ytick}{\y != 0 ? "\y" : ""}
\draw (.2, \y) -- (-.2, \y) node[left]{$\ytick$};
}
\draw[thick, color=blue, domain={-10.0}:{-1.0}, color=red, very thick,latex-, samples =350] plot(\x, {-61*(\x)^2/72 - 655*(\x)/72 - 49/4});
\draw[very thick, color=red,-latex] (-1, -4) -- (4, 8) --(10, 6);
\end{tikzpicture}
\soln{0cm}{The graph will have local maximum if it changes from increasing to decreasing and a local minimum if it changes from decreasing to increaing. The graph has local maximums at $(4, 8)$ and $(-5.4,12.2)$. The graph has a local minimum at $(-1, -4)$. }
\end{question}
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\begin{document}\begin{question}(10pts) The question goes here!
\soln{9cm}{The solution goes here.}
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<p> <p>The graph will have local maximum if it changes from increasing to decreasing and a local minimum if it changes from decreasing to increaing. The graph has local maximums at <img class="equation_image" title=" \displaystyle (4, 8) " src="/equation_images/%20%5Cdisplaystyle%20%284%2C%208%29%20" alt="LaTeX: \displaystyle (4, 8) " data-equation-content=" \displaystyle (4, 8) " /> and <img class="equation_image" title=" \displaystyle (-5.4,12.2) " src="/equation_images/%20%5Cdisplaystyle%20%28-5.4%2C12.2%29%20" alt="LaTeX: \displaystyle (-5.4,12.2) " data-equation-content=" \displaystyle (-5.4,12.2) " /> . The graph has a local minimum at <img class="equation_image" title=" \displaystyle (-1, -4) " src="/equation_images/%20%5Cdisplaystyle%20%28-1%2C%20-4%29%20" alt="LaTeX: \displaystyle (-1, -4) " data-equation-content=" \displaystyle (-1, -4) " /> . </p> </p>