Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 1 - Section 1.4 - Linear Functions and Slope - Exercise Set - Page 213: 67

Answer

$x=2$, $y=-6$. See graph below.

Work Step by Step

The slope-intercept form of a line is given by $y=mx+b$ Now, rewrite the given equation of the line in slope-intercept form as below: $\begin{align} & 6x-2y-12=0 \\ & 2y=6x-12 \\ & y=3x-6 \end{align}$ To find the value of the slope m and y intercept b, we will compare both equations: $\begin{align} & m=3 \\ & b=-6 \\ \end{align}$ Hence, the slope of the provided equation is $3$ and the $y-\text{intercept}$ is −6. Now, Consider the slope–intercept form above, that is $y=3x-6$ To plot the equation on the graph, follow the steps given below: Step 1: Plot the $y-\text{intercept}$ on the $y\ \text{axis}$, that is the point $\left( 0,-6 \right)$. Step 2: Write slope $m$ in fraction, that is $\frac{3}{1}$. Step 3: Plot the second point on the line passing through $\left( 0,-6 \right)$. Based on the slope, move 3 units up and 1 units right. The second point is $\left( 1,-3 \right)$. The resulting graph is shown below.
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