document.write( "Question 647909: Write the equation in slope-intercept form and standard form: Through (-2,7); perpendicular to x=9. \n" ); document.write( "
Algebra.Com's Answer #406462 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "The line has an undefined slope. Hence, any perpendicular to such a line must have a zero slope (horizontal). Lines with a zero slope have the characteristic that all points on the line have identical coordinates. Just set equal to that value. In the case of horizontal lines the slope-intercept and standard forms are identical.\r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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