Question

Which of the following is a function?

Responses

{(3, 7), (6, 10), (9, 14), (12, 18), (3, 22)}
{(3, 7), (6, 10), (9, 14), (12, 18), (3, 22)}

{(-4, -1), ( -2, 5), (0, 8), (0, 10)}
{(-4, -1), ( -2, 5), (0, 8), (0, 10)}

{(4, 8), ( 4, 9), (4, 10)}
{(4, 8), ( 4, 9), (4, 10)}

{(3, 10), ( -2, 10), (5, 10), (10, 10)}

Answer 1

{(3, 10), ( -2, 10), (5, 10), (10, 10)}

Explanation:

From what I know about functions is that for each number there can only be one input meaning that a number can't be used for another number for example if there is a 3 and it has a number which is 7 it can't have another output in this case 3 has another output which is 22 and that can't happen, meaning that this isn't a function. The other 2 are the same there is a number that has more than one output. The only one that has one input for every output is the last answer choice. {(3, 10), ( -2, 10), (5, 10), (10, 10)} is the only one that shows a function. Because for every input/number there is exactly one output.