Question 235602
<font face="Garamond" size="+2">


Because the equation *[tex \Large x\ =\ 4] describes a set of ordered pairs *[tex \Large \left(x,y\right)] such that every *[tex \Large x]-coordinate is 4 and the *[tex \Large y]-coordinate can be any real number.


If two points on a line have the same *[tex \Large x]-coordinate, that line must be vertical.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
</font>