Help! I don't understand this question.
Which of these relations is a function?
1. {0,1} {1,2} {2,4}
2. {0,1} {0,2} {0,3}
3. {0,1} {1,2} {1,4}
4. {0,1} {0,2} {2,4}
To learn how to recognize a function from a list of points, please review the following lesson:Help! I don't understand this question.