Y=2/x+1 евляется ли эта функция линейной и почему

No, the function y=2/x+1 is not a linear function.

A linear function is defined by the equation y = mx + b, where m and b are constants. In a linear function, the variable x appears only in the first degree (i.e., there are no exponents or fractions involving x).

In this case, the term 2/x involves the variable x in a fraction form. Consequently, the function is not linear.