Hello,
x=-3 is the vertical asymptote.
85,300,000 that's the answer you can put
31,900,000+53,400,000=85,300,000 tons
There are a total of 3 zeros in this measurement that are significant.
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.