Determine if the equation x - ya = 1 defines y as a function of x.
no. at least one input results in more than one output.
yes. one input results in one output.
no. at least one output results in more than one input.
yes. one output results in one input.

  Yes. One input results in one output.

Step-by-step explanation:

If "A" is not dependent upon x or y, this is a linear equation. Any linear equation in two (or more) variables defines a function.

Yes, this equation defines a function.

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A function has one output for each input. The appropriate description is the one shown as the Answer.

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)