What happens to the value of the expression 3y/2y as y increases

Nothing happens to 3 or 2. Only y is increasing. Everything else stays the same

It does not change anything.

This expression is constant.

Why?

If you take out the common term of the fraction, which is y, we end up with 3/2.

Another reason is that if you put any number to replace y, you get the same number, 3/2 (in simplified form).