# Slope Connections

 A line with a positive slope points up to the right.   The equation of a line with a positive slope can be written in the form $$y=mx+b$$, where $$m>0$$. A line with a negative slope points down to the right. The equation of a line with a negative slope can be written in the form $$y=mx+b$$, where $$m<0$$. A line with a slope of zero is horizontal.   The equation of a horizontal line can be written in the form $$y=mx+b$$, where $$m=0$$. Example: $$y=0x+3$$ or $$y=3$$ A line with an undefined slope is vertical. The equation of a vertical line can be written in the form $$x=c$$, where $$c$$ is a constant. Example: $$x=2$$