I need help with this question I’m not sure how to do it

over the argument its not good to fight.

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

noncoplanar points are points that do not lie on the same line.