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\n" ); document.write( ": Write the equation of the line passing through (3, –3) and (3, –6). \n" ); document.write( "

Algebra.Com's Answer #42854 by rchill(405) $\"\"$ $\"About$

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The slope, m, is defined as $\"m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29\"$ . It doesn't matter which ordered pair is $\"x%5B1%5D\"$ , $\"y%5B1%5D\"$ and $\"x%5B2%5D\"$ , $\"y%5B2%5D\"$ because you'll get the same answer. Using substitution we get $\"m=%28-3-%28-6%29%29%2F%283-3%29\"$ . Because the denominator is 0, the slope is undefined and that means the line is vertical (i.e., x values of all coordinate pairs are the same). Because x=3 for both ordered pairs, the equation of the line is x=3. \n" ); document.write( "

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