If the line L passes through the point (3,n) and (n,3), where n is not equal to 3, which of the following must be true?
1. Line L must passes through the first quadrant.
2. Line L does pass the origin.
3.The slope of L is negative	Choices
A) I only B) II only C) III only D) I and II E) II and III
Slope of the given line= 3-n/n-3   Given information is that n is not equal to 3, that means n &lt;3 or n&gt;3. In both these conditions the slope will be negative.   1) n&lt;3 (n=2)   3-2/2-3= -1   2) n&lt;3 (n= 0)   3-0/0-3= -1   3) n&lt;3 (n=-3)   3+3/ -3-3= -2/3   4) n&gt;3   3-4/4-3= -1   Answer III only
<result>C</result>
If the line L passes through the point (3,n) and (n,3), where n is not equal to 3, which of the following must be true?
1. Line L must passes through the first quadrant.
2. Line L does pass the origin.
3.The slope of L is negative