Question

The equation of line CD is (y−3) = − 2 (x − 4). What is the slope of a line perpendicular to line CD?

1 over 2

2

negative 1 over 2

−2

Answer 1

Is there a diagram showing the line CD? If so, aren't you going to post it?
Actually, we don't need a diagram to solve this problem. We're given the equation of a straight line in point-slope form, which means that the slope can be read off that equation instantaneously. I'd suggest you look up "point-slope form for the equation of a straight line" and in that manner determine where your slope, m, is located.

Once you have that slope, consider what you must do to find the slope of a line perpendicular to line CD.

Answer 2

There is no diagram, I provided all the information. I thought it was 2 but someone else was telling me it was 1/2. So I came here to clarify.

Answer 3

Eddie: I've already given you some suggestions:
"We're given the equation of a straight line in point-slope form, which means that the slope can be read off that equation instantaneously. I'd suggest you look up "point-slope form for the equation of a straight line" and in that manner determine where your slope, m, is located.

Once you have that slope, consider what you must do to find the slope of a line perpendicular to line CD." Please act upon them.