Which of the following terms best describes the graph of the exponential function given below ? f(x) =9•(1/7)^x

this is the graph

Step-by-step explanation:

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.