In this lesson, we learn about direct variation and its applications in real life scenarios, such as filling a bathtub or diving into a pool. We are shown how to find the constant of variation and use it to solve for unknown quantities. Additionally, we are introduced to using equivalent ratios and cross products as an alternative method to find the solution.
Taking a direct variation relationship and finding new values of unknown quantities based on the k of variation. Other solution method is equivalent ratios and usage of cross products.