7. A crew of electricians can wire 6 houses in 243 hours. How many hours will it take them to wire 13 houses?

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?

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