Sales at Glover's Golf Emporium have been increasing linearly. In their fourth business year, sales were $170,000. This year was their ninth business year, and sales were $315,000. If sales continue to increase at this rate, predict the sales in their twelfth business year.

i believe the correct answer is b.

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)