Question

Which relation is not a function ​

Answer 1

The 2nd choice is not a function. Hope this helps you out!

Answer 2

#2

Explanation:

Function: A special relationship where each input has a single output.

#1 It's a function:

Jan → 150

Feb → 400

March → 430

#2 It's not a function:

Jan → 150

Feb → 400

March → 400 and March → 430 (two values for March)

#3 It's a function:

Jan → 150

Feb → 150

March → 400

#4 It's a function:

Jan → 400

Feb → 400

March → 400