Which graph shows a line that is perpendicular to line qr?

Plz help plz give me the answer

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

Anyone know? is appreciated! will mark brainliest if correct!