What is the equation of the line perpendicular to #y=-7/8x # that passes through # (-5,1) #?
Looks a lot in the explanation. This is because I have explained in a lot of detail what is happening. Standard calculations would not do that!
The standared equation of a straight line graph is:
Any slope that is perpendicular to this line has the gradient of:
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I have done it this way to help with signs. Suppose that
Let the gradient of the line perpendicular be
So the equation of the perpendicular line is:
This new line passes through
Substitute these into (2) giving: