document.write( "Question 1169060: Calculate the slope between the points: (4, -3) and (4, 7) \r
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Algebra.Com's Answer #793741 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
x is constant ---> parallel to the y-axis
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\n" ); document.write( "Often called \"vertical\" but if you rotate the graph paper it's horizontal.
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