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Posted by on Friday, April 11, 2008 at 11:53pm.

Why is the line x=4 a vertical line?

  • Algebra - , Saturday, April 12, 2008 at 12:08am

    Hi:

    The equation x=4 refers to all ordered pairs whose x value is 4. Thus, for example, (4,o), (4,1), (4,2), etc. all satisfy the given equation. Notice that the three ordered pairs above fall on the vertical line passing through 4 on the x-axis. Indeed, all ordered pairs on such vertical line have x coordinate =4.

    Regards,

    Rich B.

  • Algebra - , Saturday, April 12, 2008 at 12:14am

    Thanks a million!

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