Modeling Functions with Percent Change

This GeoGebra example demonstrates how a percent change quantity can be modeled as a function and visualized to reveal how values evolve with the input. The key math ideas include function relationships, the formal representation of percent change as a ratio relative to a baseline value, and translating that relationship into a drawable geometric/graph form. Construction-wise, it leverages the listed GeoGebra objects from the construct summary—points A1, A2, A3, A4, A5, A6 as foundational reference or parameter points, along with B1, C1, and D1 as additional key points capturing pre-/post-change states or intermediate markers—so the percent-change rule can be reflected in the resulting graph/figure. Suitable for middle and high school instruction and for learners working on algebraic modeling and interpreting function graphs in real-world percentage-change problems.