The diagonals of rhombus team intersect at p(2,1). if the equation of the line that contains diagonal (ta) is y = −x + 3, what is the equation of a line that contains diagonal (em)

The perpendicular line through (2, 1) is
.. y = (x -2)+1
or
.. y = x -1

I’m guessing that the answer is c, but i’m not sure which grid is being talked about. since 5x5= 25 and 3x3= 9 (which there are no answers for). a is not right because while the ratio is the same, 6/25= 0.24 which is equal to 24% not 30%.