I need help with this question.

Question

I got this wrong on a test, and still can't figure it out.

The equation of line XY is (y−3) = (x − 4). What is the slope of a line perpendicular to XY?

Answer 1

Do you mean

y-3 =-2/[3(x-4)]

If so, the "line" is an hyperbola and in order to determine the slope of a perpendicular, you will need to specify at what point.

Otherwise, you need to clarify the equation of the line. And maybe that is why you got it wrong!