Sorry, I'm not sure.
I would suggest asking a trusted adult or teacher or redoing the lesson. Cheating isn't a good path: you will not do well in the future if you always search for answers on the internet.
A function will not have any repeating x values...it can have repeating y values, just not the x ones. In other words, ur x terms have to be all different.
A. .....this is a function
B.......not a function because u have repeating x values
C......this is a function
D......not a function because u have repeating x values
It would be six because they are like terms.
C because that’s where the lien is going
