If the transformation is $y_i = x_i^2$, the midrange of $Y$ is $34$.

If the transformation is $y_i = \frac{1}{x_i}$, the midrange of $Y$ is $0.3125$.

If the transformation is $y_i = 2^{x_i}$, the midrange of $Y$ is $130$.

For any monotonic transformation $f(x)$, the midrange of the transformed dataset is always equal to $f(\text{Midrange}(X))$.