SOLUTION: Write the equation in slope-intercept form and standard form: Through (-2,7); perpendicular to x=9.
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Question 647909: Write the equation in slope-intercept form and standard form: Through (-2,7); perpendicular to x=9.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
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.
John
My calculator said it, I believe it, that settles it
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