The weight of four hummingbirds is recorded below. The weight of each hummingbird has been rounded to the nearest one and a half gram. What is the weight of all four hummingbirds combined?

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.

For being nice i appreciate it but abc

Using the rise/run rule. you would get 2/6.simp. 1/3