Question

Problems 16 & 17: Determine if the given relation is function or not. Give its domain and range.


16. (-1, 2), (1, 3), (-1, 4), (2, 5) 17. (1, 1), (2, 2), (3, 3), (4, 4)

Answer 1

domain is all the 1st coordinates.
range is all second coordinates.

since -1 has two different images, it is not a function.