Question

1.5 part 1 question 14 determine whether the table represents functions in not. Assume that the input is in the left column in top row. Explain your answer

Answer 1

This is not a function

14) We can make a diagram to check whether this is or this is not a function.

Note that, when it comes to 1 year there are two outputs. So in this case, not every input has a one and only single output. So this is not a function, but a relation

because when we enter 1 input we have two outputs.