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Wednesday, November 17, 2010

Equations of Horizontal and Vertical Lines!

A horizontal line through the point (a,b) has equation y=b.
A horizontal line is also known as zero line.
A vertical line through the point (a,b) has equation x=a
A vertical line is also known as an undefined line.

1 comment:

  1. Also to avoid confusing the two lines remember that:
    1. An equation with only the variable x will always intersect the x-axis, so the line will be vertical
    2. An equation with only the variable y will always intersect the y-axis, so the line will be horizontal!
    If you want to know more about vertical and horizontal lines, go to page 171 in your book!

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