A line that is parallel to the x-axis and has a y-intercept of c. has the equation y = c. The line is a horizontal line with a slope of 0.
This video provides an example of how to graph a horizontal line by using a table of values (T-table).
A line that is parallel to the y-axis and has a x-intercept of a has the equation of x = a. The line is a vertical line that has no slope and no y-intercept. The slope is also said to be undefined.
This video provides an example of how to graph a vertical line by using a table of values.
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