2.
In algebra, two quantities are said to be in direct variation if the ratio of their values is always constant. The mathematical notation for direct variation is y = kx, where k is a non-zero constant, also called the constant of variation, and x and y are the two quantities in question.
Given the equation xy = 94, we can see that the product of x and y is always equal to 94. That is an indication of direct variation.
If we divide both side by x, we get y = 94/x which is the equation of direct variation, y is directly proportional to x, where k = 94/x.
So, the equation xy = 94 is an example of direct variation.