What does Koenig do to try and confirm the existence of a pay phone at Best Buy?

i think it is d tell if im wrong

. a function is a relation in which each input has only one output. in the relation , y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y. x is not a function of y, because the input y = 3 has multiple outputs: x = 1 and x = 2.

the second sentance should look more like this: the doughnuts we bought were the best we had ever tasted.