document.write( "Question 970951: Determine the Equation of a vertical line that goes through the point (-3,7) \n" ); document.write( "
Algebra.Com's Answer #593589 by Theo(13342)\"\" \"About 
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x = -3\r
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\n" ); document.write( "\n" ); document.write( "since it's a vertical line, any value of y will satisfy the eqution.\r
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\n" ); document.write( "\n" ); document.write( "y = 7 is just one of them.\r
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\n" ); document.write( "\n" ); document.write( "the value of x is always -3.\r
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\n" ); document.write( "\n" ); document.write( "the slope is undefined because there is no change in the value of x and the formula for slope is change in value of y divided by change in value of x.\r
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\n" ); document.write( "\n" ); document.write( "the standard form of the equation for a straight line is ax + by = c.\r
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\n" ); document.write( "\n" ); document.write( "when the line is vertical, the value of b is equal to 0.\r
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\n" ); document.write( "\n" ); document.write( "you get ax + 0y = c\r
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\n" ); document.write( "\n" ); document.write( "0y disappears and you are left with ax = c\r
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