Which of the tables represents a function?

table a
input output
4 3
3 2
3 1
table b
input output
1 3
3 5
5 7
table c
input output
0 0
1 4
1 5
table d
input output
4 1
4 2
4 3

table a
table b
table c
table d

Afarm is to be built in the shape of quadrilateral abcd, as shown below. all four sides are equal. a rhombus abcd is shown with diagonal ac equal to 15.5 feet and diagonal bd equal to 13.2 feet. what is the area of the farm? pleas only pick from the 4 below 62 square feet 52.8 square feet 57.4 square feet 102.3 square feet