Question 226488
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If the equation is x equal to a constant, that means that the set of ordered pairs that satisfy the equation are all of the form (a, y) where a is the constant and y can be any value whatsoever.  What sort of line would be formed by such a set of points?


Try it out for yourself.  Let a equal some arbitrary value, say 2.  Then form a couple of points of the form (2,y) where y is some value you choose.  Plot the points and draw a line through them.  What sort of a line is it?



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