You can put this solution on YOUR website! The problem is the same as, find the equation of the line perpendicular to the one containing (0,0) and (4,-2), and passing through the midpoint of the segment connecting those two given points.
Here is an outline of what you can do:
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Line containing (0,0) and (4,-2)
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slope is , and intercepts are 0.
Negative reciprocal of that line's slope
Midpoint of endpoints (0,0) and (4,-2)
(You do this?)
Use point-slope form to find the requested line's equation
(You do this?)
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