Use the expression for the slope from part B to write a general equation for the slope of any two points (a, b) and (c, d).

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.

The difference is 5,100m?