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)}

Basically, for every x there is one y
in the inverse, y and x are flipped

so for it must have no repeating x's or y's
basically, look for the set with NO REPEATING NUMBERS

fisrt one
no repeats
good

2nd one
6 repeats with -4 and -1

3rd one
8 repeats with -1 and 4

4th one
1 repeats with 4 and 11

answer is first function   {(–4, 3), (–2, 7), (–1, 0), (4, –3), (11, –7)}

Idon’t know i’m in the same boat