What percent is represented by the shaded area?

90%, or 180%, it depends on if one rectangle equals one whole, if yes, then 180%, but if both rectangles equal one whole then 90%

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