SOLUTION: find the equation of a line perpendicular to y=7 through the point (-4,8) I need help please

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Question 731565: find the equation of a line perpendicular to y=7 through the point (-4,8)
I need help please
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
y=7 is a horizontal line; so, slope +m+=+0
If two lines are perpendicular, their slopes are negative reciprocals.
so, perpendicular line will have slope m%5Bp%5D=-1%2Fm which is m%5Bp%5D=-1%2F0
The slope of a vertical line is undefined because anything divided by zero is undefined.
only one vertical line passes through given point (-4,8) will is perpendicular to y=7, and that is x=-4