art supply store is having inventory sales. All items are marked down by 25 percent. Michael plans to buy three sets of oil paints and two paint brushes. He calculates the sale price of each item by using the function f(p)=p-0.25p where p represents the
original price of the item.

Most often use of these terms is in relation to analytical equations. Generally the independent variable is on the right while the dependent variable is on the left. Example

Y = 3*X + 4. Y is the dependent variable and X is the independent variable plus the constant (plus 4).