document.write( "Question 101148: Write the equation of the line passing through (3, –3) and (3, –6). \n" ); document.write( "

Algebra.Com's Answer #73652 by jim_thompson5910(35256) $\"\"$ $\"About$

You can put this solution on YOUR website!
First lets find the slope through the points ( $\"3\"$ , $\"-3\"$ ) and ( $\"3\"$ , $\"-6\"$ )\r
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\n" ); document.write( "\n" ); document.write( " $\"m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29\"$ Start with the slope formula (note:

is the first point ( $\"3\"$ , $\"-3\"$ ) and

is the second point ( $\"3\"$ , $\"-6\"$ ))\r
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\n" ); document.write( "\n" ); document.write( " $\"m=%28-6--3%29%2F%283-3%29\"$ Plug in $\"y%5B2%5D=-6\"$ , $\"y%5B1%5D=-3\"$ , $\"x%5B2%5D=3\"$ , $\"x%5B1%5D=3\"$ (these are the coordinates of given points)\r
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\n" ); document.write( "\n" ); document.write( " $\"m=+-3%2F0\"$ Subtract the terms in the numerator $\"-6--3\"$ to get $\"-3\"$ . Subtract the terms in the denominator $\"3-3\"$ to get $\"0\"$ \r
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\n" ); document.write( "\n" ); document.write( "Since the denominator is zero, the slope is undefined (remember you cannot divide by zero). So we cannot use the slope intercept form to write an equation. So we can only say that the equation is a vertical line through $\"x=3\"$ , which means the equation is $\"x=3\"$ (notice this is not in slope-intercept form)\r
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\n" ); document.write( "\n" ); document.write( "So the equation $\"x=3\"$ looks like this:\r
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Graph of $\"x=3\"$ through the points ( $\"3\"$ , $\"-3\"$ ) and ( $\"3\"$ , $\"-6\"$ )
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