A grid 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?
The distance is given by
sqrt [ ( - 5 - -9)^2 + (2 - 9)^2 ] = sqrt [ 4^2 + 7^2] = sqrt [ 16 + 49] = sqrt [ 65] = about 8.06 or, to the nearest unit, 8
