Tuesday, May 27, 2014

Precalculus, Chapter 1, 1.3, Section 1.3, Problem 94

a. Determine the intercepts of the graph of the equation $6x - 4y = 24$.

$x$-intercepts:


$
\begin{equation}
\begin{aligned}

6x - 4y =& 24
&& \text{Given equation}
\\
6x - 4(0) =& 24
&& \text{To find the $x$-intercept, we let $y = 0$ and solve for $x$}
\\
6x =& 24
&&
\\
x =& 4
&&

\end{aligned}
\end{equation}
$


The $x$-intercept is $(4,0)$


$y$-intercepts:


$
\begin{equation}
\begin{aligned}

6x - 4y =& 24
&& \text{Given equation}
\\
6(0) - 4y =& 24
&& \text{To find the $y$-intercept, we let $x = 0$ and solve for $y$}
\\
-4y =& 24
&&
\\
y =& -6
&&

\end{aligned}
\end{equation}
$


The $y$-intercept is $(0,-6)$


Graph the equation

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