The data in which table represents a linear function that has a slope of zero? (picture should be in order of abcd, but just incase please when answering save the image and add it to your answer)

The data in which table represents a linear function that has a slope of zero picture should be in order of abcd but just incase please when answering save the class=
The data in which table represents a linear function that has a slope of zero picture should be in order of abcd but just incase please when answering save the class=
The data in which table represents a linear function that has a slope of zero picture should be in order of abcd but just incase please when answering save the class=
The data in which table represents a linear function that has a slope of zero picture should be in order of abcd but just incase please when answering save the class=