How a monotonically increasing function of two variables be written?

yes. 2 variables can be written in one statement. take for example the equation y=3x+5, as long as you have a single solution to work with there can be 2 variables.

using pointers, example: void Swapd (double *d1, double *d2) { . double tmp= *d1; . *d1= *d2; . *d2= *tmp; }

Here is an example for a variable, which is a function (function-pointer, actually): int (*myfun)(const char *s); myfun = puts; myfun ("Hello, world");

a variable is something you change and there's a independent variable and a dependent variable

The long run is the lengthy period of time during with all inputs can be varied. There are no fixed output in the long run. All factors of production are variable inputs.We now analyze production...