Here, A, B, and C are real numbers and A and B cannot both equal 0. Several combinations of A, B, and C can describe the same line, but representing them with the smallest possible integers is preferred.
To draw the graph of the function, we can plot all five points in a coordinate plane and connect them with a line.
Notice that the graph does not extend infinitely. This is because, since x and y represent the numbers of different cups, negative numbers should not be included.