Triangle ABC has been transformed into triangle A'B'C'. The algebraic formula for this transformation is

A) (x', y') = (2x, y)
B) (x', y') = (x, 2y)
C) (x', y') = (2x, 2y)
D) (x', y') = (2y, 2x)

Agrid shows the positions of a subway stop and your house. the subway stop is located at (-5,2) and your house is located at (-9,9). what is the distance, to the nearest unit, between your house and the subway stop?