Analyzing the Domain and Range of Quadratic Functions through Graphs

This lesson teaches how to determine the domain and range of a quadratic function by analyzing its graph. The domain is the set of all possible x-values, while the range is the set of all possible y-values. By examining the graph, one can trace the x-values along the x-axis and the y-values along the y-axis to identify the domain and range. The lesson explains that the domain often includes all real numbers, while the range is determined by the minimum and maximum y-values the graph reaches. Practical examples with parabolas are used to illustrate these concepts.

What does it mean when we say the range of a quadratic function is y is greater than or equal to 2?

Describe the process of finding the domain and range of a parabola.