Today, Cal and I discussed the nomenclature for functions containing more than one variable. We discussed the difference between the dependent variable, y, and the independent variable, x. Cal and I worked through several problems using the vertical line test to determine if a line is a function that results in only one answer for y for each value of x. Cal also learned the meaning of domain and range as related to functions with variables x and y. We also briefly discussed the use of ratios in math, chemistry, cooking, and engineering.