Course Enduring Understandings: Mathematical functions are relationships that assign each member of one set (domain) to a unique member of another set (range), and the relationship is recognizable across representations. Families of functions exhibit properties and behaviors that can be recognized across representations. Functions can be transformed, combined, and composed to create new functions in mathematical and real world situations Bivariate data can be modeled with mathematical functions that approximate the data well and help us make predictions based on the data. Degree and direction of linear association between two variables is measurable.