Question

Which of the sets of ordered pairs represents a function?

Answer 1

A function WILL NOT have any repeating x values. They can have repeating y values, just not the x ones. So just look at the x values.

so look at x values in  A.....are there any repeating x values ? Yes there is....there are repeating 2's...therefore, A is not a function.

now look at the x values in B...are there any repeating x values ? yes there is....there are repeating 9's....so B is not a function.

so neither A or B are functions