A raft travels down river at a rate of 6 miles per hour the total difference D in miles that the RAF travels is equal to the rate times the number of hours each what is the independent and dependent variable and what is the equation

Od. 130 degrees because if you add them together you get the 130

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.