Answer: { ( 8 , 6 ) , ( − 1 , 2 ) , ( 8 , − 8 ) , ( 1 , 9 ) }
Explanation:
The x coordinate 8 repeats itself for the points (8,6) and (8,-8). This is enough info to see that we don't have a function. A function is only possible when any x value goes to exactly one y value.