Question

Which function has an inverse that is also a function?
{(–4, 3), (–2, 7), (–1, 0), (4, –3), (11, –7)}
{(–4, 6), (–2, 2), (–1, 6), (4, 2), (11, 2)}
{(–4, 5), (–2, 9), (–1, 8), (4, 8), (11, 4)}
{(–4, 4), (–2, –1), (–1, 0), (4, 1), (11, 1)}

Answer 1

A function \(f\) has an inverse function if and only if it is a one-to-one and onto function.

Answer 2

so we cant have repeat elements in our range

Answer 3

which one of these sets of ordered pairs have ordered pairs where every y value is different.

Answer 4

Thank you!

Answer 5

np