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?

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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) About Me  (Show Source):
You can put this solution on YOUR website!
The line x=-15 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 slope=0.
See both lines in the drawing below.

The slope intercept form is highlight%28y=0%2Ax%2B15%29 or highlight%28y=15%29 .

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 %28-1%29, as for perpendicular lines with slopes 3 and %28-1%2F3%29, or perpendicular lines with slopes %28-2%2F5%29 and 5%2F2 .