Educational Studies in Mathematics, Vol. 73, No. 1 (Jan., 2010), pp. 3-19 (17 pages) This study is part of a project concerned with the analysis of how students work with two-variable functions. This ...

There is a function in math called the “Greatest Integer Function,” which assigns a value to every number that is the largest integer less than or equal to that number. For example, the numbers 1, 1.2 ...