👉 Learn how to graph linear equations with one variable. When given a linear equation with one variable in the form x = a or ...

👉 Learn how to graph linear inequalities with one variable. Linear inequalities are graphed the same way as linear equations ...

Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to bottom, perpendicular to the horizon, with undefined slope and equation x = k.