Answer
If an equation in two variables (x and y)yields precisely one value of y for each value x, we say that y is a function of x.
Work Step by Step
Consider an equation in two variables is\[ax+by+c=0\],
The above equation describes y as a function of xif for each value of x, there exist unique value of y.
Example:
Consider an equation in two variables,\[y=5x-2\]
It can be seen that for each value of x, there exist a unique value of y.
Thus, for the provided equation y is a function of x.
