What is 28 over 56 being reduced

What is the rule for reflection across the y axis

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

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