Step-by-step explanation: Think of this as a soda machine. Input a code and it should give you one soda- not different kinds if you were to try it. This applies to functions. There should be one output for each x value. The value 1 in the x part for he order pair has 6 and 10, when it should only have one- either 6 or 10. So, not it is not a function.
