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Use the table below to estimate the velocity at \(\displaystyle t=9\) by averaging the slopes of the two adjacent secant lines corresponding to the two points closest to \(\displaystyle (9,23)\)


Using the point to the left gives \(\displaystyle m_1 = \frac{23-17}{9-6} = 2\). Using the point to the right gives \(\displaystyle m_2 = \frac{23-28}{9-12} = \frac{5}{3}\). Taking the average of the slopes gives \(\displaystyle \frac{2+\frac{5}{3}}{2} = \frac{11}{6}\). The estimate of the velocity is \(\displaystyle \frac{11}{6}\) meters per second.

Download \(\LaTeX\)

\begin{question}Use the table below to estimate the velocity at $t=9$ by averaging the slopes of the two adjacent secant lines corresponding to the two points closest to $(9,23)$\newline
\begin{tabular}{|c|c|c|c|c|c|}\hline
$t$ seconds & 0 & 3 & 6 & 9 & 12 \\ \hline
$x$ meters & 8 & 13 & 17 & 23 & 28 \\ \hline
\end{tabular}\newline

    \soln{9cm}{Using the point to the left gives $m_1 = \frac{23-17}{9-6} = 2$. Using the point to the right gives $m_2 = \frac{23-28}{9-12} = \frac{5}{3}$. Taking the average of the slopes gives $\frac{2+\frac{5}{3}}{2} = \frac{11}{6}$. The estimate of the velocity is $\frac{11}{6}$ meters per second.}

\end{question}

Download Question and Solution Environment\(\LaTeX\)
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HTML for Canvas
<p> <p>Use the table below to estimate the velocity at  <img class="equation_image" title=" \displaystyle t=9 " src="/equation_images/%20%5Cdisplaystyle%20t%3D9%20" alt="LaTeX:  \displaystyle t=9 " data-equation-content=" \displaystyle t=9 " />  by averaging the slopes of the two adjacent secant lines corresponding to the two points closest to  <img class="equation_image" title=" \displaystyle (9,23) " src="/equation_images/%20%5Cdisplaystyle%20%289%2C23%29%20" alt="LaTeX:  \displaystyle (9,23) " data-equation-content=" \displaystyle (9,23) " /> <br>
</p> </p>
HTML for Canvas
<p> <p>Using the point to the left gives  <img class="equation_image" title=" \displaystyle m_1 = \frac{23-17}{9-6} = 2 " src="/equation_images/%20%5Cdisplaystyle%20m_1%20%3D%20%5Cfrac%7B23-17%7D%7B9-6%7D%20%3D%202%20" alt="LaTeX:  \displaystyle m_1 = \frac{23-17}{9-6} = 2 " data-equation-content=" \displaystyle m_1 = \frac{23-17}{9-6} = 2 " /> . Using the point to the right gives  <img class="equation_image" title=" \displaystyle m_2 = \frac{23-28}{9-12} = \frac{5}{3} " src="/equation_images/%20%5Cdisplaystyle%20m_2%20%3D%20%5Cfrac%7B23-28%7D%7B9-12%7D%20%3D%20%5Cfrac%7B5%7D%7B3%7D%20" alt="LaTeX:  \displaystyle m_2 = \frac{23-28}{9-12} = \frac{5}{3} " data-equation-content=" \displaystyle m_2 = \frac{23-28}{9-12} = \frac{5}{3} " /> . Taking the average of the slopes gives  <img class="equation_image" title=" \displaystyle \frac{2+\frac{5}{3}}{2} = \frac{11}{6} " src="/equation_images/%20%5Cdisplaystyle%20%5Cfrac%7B2%2B%5Cfrac%7B5%7D%7B3%7D%7D%7B2%7D%20%3D%20%5Cfrac%7B11%7D%7B6%7D%20" alt="LaTeX:  \displaystyle \frac{2+\frac{5}{3}}{2} = \frac{11}{6} " data-equation-content=" \displaystyle \frac{2+\frac{5}{3}}{2} = \frac{11}{6} " /> . The estimate of the velocity is  <img class="equation_image" title=" \displaystyle \frac{11}{6} " src="/equation_images/%20%5Cdisplaystyle%20%5Cfrac%7B11%7D%7B6%7D%20" alt="LaTeX:  \displaystyle \frac{11}{6} " data-equation-content=" \displaystyle \frac{11}{6} " />  meters per second.</p> </p>