Lines Parallel to Axes - Lines parallel to x-axis and y-axis, Equation, Graph of lines parallel to axes, Solved Examples
Lines parallel to the axes, Horizontal and vertical lines, The point-slope form of a line
linear algebra - Reflect the Shape A in the line x = 1. - Mathematics Stack Exchange
Intercepts of lines review (x-intercepts and y-intercepts) (article)
Horizontal and Vertical Lines: Review and Examples
Vertical line: traits, examples and usage in mathematics
3 Ways to Figure out if Two Lines Are Parallel - wikiHow
Lesson Explainer: Equations of Straight Lines
Different forms of an Equation of a Line - Explained with Graph
How use the slope formula and find the slope of a line, whether the Slope is positive, negative or undefined.