1. He found it hard to make friends in the new environment

hmmm

Explanation:

The person needs to wait awhile, since it takes awhile for everything to adjust. The person will soon to realize that making friends isnt hard at all.

i think that the major difference is that it used to be modern

. 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.