# Chapter 2 - 2.1 - Linear Equations in Two Variables - 2.1 Exercises - Page 169: 20

Slope: not possible to evaluate y-intercept: there is no y-intercept

#### Work Step by Step

In a linear equation $y=mx+b$, $m$ is the slope and $(0,b)$ the y-intercept. That is, the y-intercept is the point on the line when $x=0$ $x+4=0$ $x+4=0y$ $0y=1x+4~~~~$ In order to find the slope, we should divide both sides by $0$. In this case we would find that: $m=\frac{1}{0}$ Also, $x+4=0$ $x=-4$ Slope: not possible to evaluate y-intercept: it is a vertical line with $x=-4$. That is, there no point on the line when $x=0$

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