document.write( "Question 179287This question is from textbook
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Algebra.Com's Answer #134209 by Mathtut(3670)\"\" \"About 
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if it is perpendicular to the x axis it is a vertical line
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\n" ); document.write( "to pass through (-4,7) and be vertical the equation has to be
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\n" ); document.write( "x=-4
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