This is a case of use of multiplication operation.
This is, a train has 7 cars with 114 seat seat passengers, you could add up 114 seven times: 114 + 114 + 114 + 114 + 114 + 114 + 114, but instead you should use the multiplication which is a sum abreviated:
114
x 7
-----
798
Answer: 798
A) For 100R, that might mean every week, he is putting 100 dollars away for an interpretation.
B) The Slope represents the time it takes to make 100 dollars, and S represents the total amount of money Tim has.
C) If Tim got to 1250 dollars, it would be 8 for R. So 8 would be the domain and 1250 for the range.
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Neither.
This is because one equation is without variables and the other is with variables.
You can cancel out nothing