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: 81

Answer

The graph of the provided linear function is shown below:

Work Step by Step

Step1: Find the value of the $x-\text{intercept}$ Let $f\left( x \right)=0$ Substitute the value of $f\left( x \right)$ in the given linear function $\begin{align} & 3x-4\times \left( 0 \right)-6=0\text{ } \\ & 3x-6+6=+6\text{ }\left( \text{adding 6 to both side} \right) \\ & \frac{3x}{3}=\frac{6}{3}\text{ }\left( \text{dividing both side by 3} \right) \\ & x=2 \end{align}$ Hence, the value of the x-intercept is $2$. Or, in coordinate form, the point found is $\left( 2,0 \right)$ Step 2: Find the value of the $y-\text{intercept}$ Let $x=0$ Substitute the value of $x$ in the provided linear function $\begin{align} & 3\left( 0 \right)-4f\left( x \right)-6=0\text{ } \\ & -4f\left( x \right)-6+6=+6\text{ }\left( \text{adding 6 to both side} \right) \\ & -\frac{4f\left( x \right)}{-4}=\frac{6}{-4}\text{ }\left( \text{dividing both side by}-\text{ 4} \right) \\ & f\left( x \right)=-\frac{3}{2} \end{align}$ Hence, the value of the $y-\text{intercept}$ is $-\frac{3}{2}$. Or, In coordinate form, the point found is $\left( 0,-\frac{3}{2} \right)$ With the help of the $x$ and $y$ intercepts, the graph of the provided linear function can be plotted.
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