PLEASE HELP ME Which of the following tables represents a function?

x 1 −1 4 −4

y 8 8 10 10

x 2 2 3 3

y 6 −6 7 7

x 5 −5 5 −5

y 10 11 12 13

x 2 2 7 7

y 2 3 4 5

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?