Question 149527: "Explain in your own words(at least 50 words) why the line x = 4 is a
vertical line?"
I think i know the answer i just have a hard time explaining this can you help me?
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! Notice that "y" is nowhere to be seen in this equation. This means that y can be any value while x must be equal to 4.
So let's plot the points (4,-5), (4,-4), (4,-3), (4,-2), (4,-1), (4,0), (4,1), (4,2), (4,3), (4,4), and (4,5)
Notice how all of these points have the x coordinate 4 and y is any value.
Now draw a line through these points to graph 
 Graph of
So we can see that the line is a vertical line through
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