What is the meaning of the function of h = f (50, t) ? describe the behavior of this function?

Dependent variable h depends upon two independent variaables, one of which is represented by 50 and the other by the letter t. In other words, h is a function of two variables. Without further detail it is impossible to describe the behavior of this function h=f (50, t).

Suppose that h = f (x, t) = 2x - 1/t. This is my invention.

Then f (50, t) would come out as 2 (50) - 1/t, which is a function of just 1 variable.