Question 388527
<font face="Garamond" size="+2">


A vertical line that passes through the point (9,7) will consist of a set of ordered pairs such that the x-coordinate is always 9, ergo:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x\ =\ 9]


Which is just another way of saying give me the set of all ordered pairs where the x-coordinate is 9 and I don't care what the y-coordinate is.


Using similar logic you should be able to handle the horizontal line part of this question.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
<div style="text-align:center"><a href="http://outcampaign.org/" target="_blank"><img src="http://cdn.cloudfiles.mosso.com/c116811/scarlet_A.png" border="0" alt="The Out Campaign: Scarlet Letter of Atheism" width="143" height="122" /></a></div>
</font>