<PRE><B>Question 980902</B>


&lt;B&gt;&lt;U&gt;Question&lt;/U&gt;&lt;/B&gt;:
If v_1= (a, -b) and v_2= &lt;-2a, 2b&gt;, are v_1 and v_2 parallel? 


&lt;B&gt;&lt;U&gt;Answer&lt;/U&gt;&lt;/B&gt;:
These vectors are not parallel.
They are anti-parallel.
Parallel vector are those whose corresponding segments are parallel and have the same direction. 


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