SOLUTION: The graph of f passes through (-8, 15) and is perpendicular to the line whose equation is x=-15 . What is the slope intercept form?

Question 714993: The graph of f passes through (-8, 15) and is perpendicular to the line whose equation is x=-15
. What is the slope intercept form?
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
The line is what we call a "vertical" line, with "undefined" slope.
(It is vertical on my computer screen).
A line perpendicular to a vertical line is what we call a "horizontal" line, with .
See both lines in the drawing below.

The slope intercept form is or .

Pairs of perpendicular lines can present two different cases:
EITHER one line is vertical and the other is horizontal,
OR both lines have a slope and the product of the slopes is , as for perpendicular lines with slopes and , or perpendicular lines with slopes and .
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