Question

Select all the correct answers.
Which tables represent constant functions?

x y
2 -1
2 0
2 1

x y
2 -3
4 -7
6 -11

x y
2 3
4 3
6 3

x y
1 3
2 12
3 27

x y
1 -1
2 -1
3 -1

Answer 1

The 3rd and 5th tables.

Reason: a constant function has the same y-value for every x. The 3rd table has y = 3 for all x, and the 5th has y = -1 for all x. (The 1st table is not even a function since x = 2 maps to multiple y values.)