Question

Is the following relation a function?

see attachment

Answer 1

no because 0 and 4 produce the same result

Answer 2

Yes it is. Moreover it is many-one type function.

Answer 3

@thomasj it's a function
A relation is a function if for each x there is only one y so it's a function

Answer 4

yes it is a function. many to one type

Answer 5

Eg of {not a function} is that for one value of x, you have more than one value of y.

Answer 6

no because 0 and 4 produce the same result

Answer 7

no because 0 and 4 produce the same result

Answer 8

no because 0 and 4 produce the same result

Answer 9

@thomasj , have a check at your basics again :)

Answer 10

@thomasj what is wrong with the x^2? It is a function but not the x^(1/2) unless we restrict it to some particular range..