Lines  
By Vicki Young

There are four parts to every line,
You must remember these:
Points, slope, equation, graph,
And keep them separate, please!

Oblique lines have x and y;
The slope gives rise and run.
Just solve for y to start the graph;
Use slope to make it fun!

A vertical line, like x = 3,
Has slope that’s UNDEFINED.
Plot 3 on the x-axis and draw the graph,
An UP and DOWN line.

y = 5 is a horizontal line;
The slope is ZERO, you see.
Plot 5 on the y-axis and draw the line,
SIDE to SIDE it will be.