Which relation is a function? О O
A. (8,-4), (8, 4), (6,-3), (6, 3), (0, 0)
O B. (4,7), (8,5), (6,4), (5,3), (4, 2)
O C. (0,0), (1, 1), (2, 2), (3, 3), (4,7)
о O
D. (0,0), (1, 0), (1, 1), (2, 1), (1, 2)

The median segment divides the triangle into 2 isosceles triangles and everything else is trivial.|ad|=|bc|2=|bd|soδadb  is isosceles with∠dab=∠dbasimilarlyδadc  is isosceles with  ∠dac=∠dca∠cab=∠cad+∠bad=∠acb+∠abctherefore∠cab  is a right angleandbc  is the hypotenuse of a right-angled triangle.hope this