Question

Look at this set of ordered pairs:

(18, 17)
(12, 11)
(0,8)
(6, 7)
Is this relation a function?
yes
no

Answer 1

Answer: Yes

If I remember correctly, I believe these ordered pairs indicate a function, as there is exactly 1 output for every input (i.e., (output, input)). If there were 2 inputs of the same number, that'd make this relation not a function.