How do you write an equation that is perpendicular to y = -1/2x + 2/3, passes through (2,3)?
A straight line graph that is perpendicular to this would have the gradient of
So we know that the line we are looking for is of form:
This has 3 unknowns so we need to change it so that there is only 1 unknown and thus solvable.
We are told that it passes through the point
So we now have