Answer:
3.28 *10^3 represents 3,280 written in scientific notation.
That link is a tracker don’t open it
4 because none of the dots are on the same line in that one. To figure out if a problem is a function you can do the pencil test and just go across the graph and if the dots are on the same line they wouldn't be a function. I'm not good at explaining but you could look it up and it'll help you more but the answer to this is 4.
I think it's the D I hope it goes well