Now let's use a graphing calculator to get a graph of
\(\mathrm{C}=\frac{5}{9}(\mathrm{~F}-32)\). By letting \(\mathrm{F}=x\) and
\(\mathrm{C}=y\), we obtain Figure 7.15. Pay special attention to the boundaries
on \(x\). These values were chosen so that the fraction
\(\frac{\text { (Maximum value of } x \text { ) minus (Minimum value of } x
\text { ) }}{95}\)
would be equal to 1 . The viewing window of the graphing calculator used to
produce Figure \(7.15\) is 95 pixels (dots) wide. Therefore, we use 95 as the
denominator of the fraction. We chose the boundaries for \(y\) to make sure that
the cursor would be visible on the screen when we looked for certain values.
\(7.2\) = Linear Inequalities in Two Variables
337
Now let's use the TRACE feature of the graphing calculator to complete the
following table. Note that the cursor moves in increments of 1 as we trace
along the graph.
\begin{tabular}{l|lllllllll}
\(\mathbf{F}\) & \(-5\) & 5 & 9 & 11 & 12 & 20 & 30 & 45 & 60 \\
\hline \(\mathbf{C}\) & & & & & & & & &
\end{tabular}
(This was accomplished by setting the aforementioned fraction equal to 1.) By
moving the cursor to each of the F values, we can complete the table as
follows.
\begin{tabular}{r|rrrrrrrrr}
\(\mathbf{F}\) & \(-5\) & 5 & 9 & 11 & 12 & 20 & 30 & 45 & 60 \\
\hline \(\mathbf{C}\) & \(-21\) & \(-15\) & \(-13\) & \(-12\) & \(-11\) & \(-7\) & \(-1\) & 7
& 16
\end{tabular}
The \(C\) values are expressed to the nearest degree. Use your calculator and
check the values in the table by using the equation
\(\mathrm{C}=\frac{5}{9}(\mathrm{~F}-32)\).
Explanations 
Textbooks 
Flashcards 
91影视 AI 
Notes 
Study Plans 
Study Sets 
Find a degree 
Magazine 
