CPM Homework Help : AC Problem 8-9

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Home > AC > Chapter 8 > Lesson 8.1.1 > Problem 8-9

8-9.

For each line below, name the slope and $y$ -intercept.

$y=\frac{-1+4x}{2}$
Hint (a):
This equation, rewritten, is the same as saying:
$y=\frac{4}{2}x-\frac{1}{2}$
Hint (a):
Knowing this information, can you identify the $y$ -intercept and the slope?
Answer (a):
$\text{Slope}=\frac{4}{2}=2 \ \ \ \ \ \ \ y\text{-intercept}=-\frac{1}{2}$

$3x+y=-7$
Hint (b):
Rewrite the equation in $y=mx+b$ form, then identify the slope and the $y$ -intercept.

$y=\frac{-2}{3}x+8$
Hint (c):
The equation is already in $y=mx$ + b form, so identify the slope and $y$ -intercept in the equation.

$y=-2$
Hint (d):
Remember that $y=−2$ is a horizontal line.
Answer (d):
Because it is horizontal, the line has zero slope and the $y$ -intercept is given right in the equation, $−2$ .

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