Question

An equation of the normal to the graph of
f(x)= x/2x-3 at (1,f(1))
The answer is x-3y=4. Please explain how to get to this answer.

Answer 1

First of all, identify the slope of the given function f(x).

You want not this slope, but the slope of a line perpendicular to the given function f(x).

If two lines are perpendicular, their slopes have a definite relationship. What is that relationship?

Answer 2

They have opposite slopes