The graph of f (in blue) is translated a whole number of units horizontally and vertically to obtain the graph of k (in red).

the function is defined by f(x)=|x|

write down the expression for k(x)

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.