Question

Which relation shown is not a function?

O {(14, 15). (5. 7). (3. 10). (11, 1). (3.8)}
O {(1, 1), (2, 2), (3, 3), (4. 4), (5,4)}
O {(14, 15). (5, 7), (3, 10), (11, 1), (6, 10)}
O {(14, 15). (5. 15). (3. 15). (11, 15). (5, 15)}

Answer 1

Answer: the last one

Explanation:

the easiest way to do this is the vertical line test. Graph the relation separately and then roll a pencil over each one. If the pencil touches two points at the same time, then it is not a function. Or you can look at the x inputs and if any are the same, it’s not a function.