A function is a special type of a relation, such that for every x-value there is one and only one y-value. In this lesson we'll learn about the domain and the range of functions, the dependent and independent variables, and how to represent a function with a diagram. When writing functions we usually write out the name of the function, followed by the independent variable in parenthesis, then the expression or rule that defines the function. We'll also learn how to evaluate functions. To evaluate a function, we can substitute a number in for the independent variable
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Introduction to Functions
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.