1. To describe a relation by using a mathematical sentence, y is expressed in terms of x, where is the independent variable and is the dependent variable. 2. A is a special kind of relation. 3. A is a statement of equality or inequality between algebraic expressions. 4. The function notation tells you that y is a function of x. 5. is a situation in which we do not have an immediate solution. is the value of the function at x. 6. fis the name of the function and 7. Four steps to solve problems:​