The following table gives the map co-ordinates and shipping loads for some local cities. We wish to build a new warehouse in a central location in order to minimize transportation costs. At what co-ordinates should this warehouse be located?

City Map Co-ordinates (x, y) Number of truckloads

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Brampton (6.0, 3.0) 9

Barrie (9.0, 10.0) 10

Mississauga (6.0, 1.8) 15

Oakville (2.0, 0.8) 6

Milton (1.8, 2.8) 8