What do the linear function and the absolute value function have in common? More importantly, how are their domains and ranges different?
In this video, we’ll introduce the concepts of domain and range by comparing two familiar functions: a linear function and an absolute value function. You’ll learn how domain represents the possible inputs (x-values) and range represents the possible outputs (y-values). By examining these graphs side-by-side, you’ll see why both functions have the same domain but different ranges.
In this lesson you’ll learn:
• What domain means
• What range means
• How domain relates to x-values (inputs)
• How range relates to y-values (outputs)
• How to find domain from a graph
• How to find range from a graph
• Why linear and absolute value functions have different ranges
Whether you’re taking Algebra 1, Algebra 2, College Algebra, or preparing for the ACT, understanding domain and range is an essential skill for working with functions.
