If someone can pls give the answer with steps that would be greatly appreciated :)

8) D

To find the slope of a line that is perpendicular to another, take the slope and do the negative reciprocal. That is, flip the fraction and make the sign opposite.

9) C

Do the negative reciprocal of -4 to find the slope. It is 1/4. So it's either A or C. Then plug in the point (4, -1) to A and C and see which equation works. C works because you get -1 = 1/4 (4) - 2, which simplifies to -1 = 1 - 2, which simplifies to -1 = -1, which is true. When doing that for A, you get -1 = 1, which is wrong.