Horizontal and Vertical Lines in Graphs Help
Horizontal and Vertical Lines
Any equation of the form x = a, where a is a real number, is the graph of a vertical line passing through the point (a, 0) on the x axis.
Graph the line x = –5.
Draw a vertical line passing through the point (–5, 0) on the x axis (see Fig. 11-14 ).
Any equation of the form y = b, where b is any real number, is the graph of a horizontal line passing through the point (0, b) on the y axis.
Graph the line y = 4.
Draw a horizontal line through the point (0, 4) on the y axis (see Fig. 11-15 ).
Horizontal and Vertical Lines Practice Problems
Draw the graph of each of the following:
1. y = 6
2. x = –4
3. y = –2
4. x = 3
5. y = 2
1. See Fig. 11-16
2. See Fig. 11-17
3. See Fig. 11-18
4. See Fig. 11-19
5. See Fig. 11-20
Practice problems for these concepts can be found at: Graphing Practice Test.