Math Example--Exponential Concepts--Exponential Functions in Tabular and Graph Form: Example 24

Topic

Exponential Functions

Description

This math example demonstrates the creation of a table of x-y coordinates and the graphing of the exponential function y = -3 * 10^-x. The image showcases both a graph and a corresponding table, highlighting the behavior of this negative exponential function with a coefficient. The table includes key points such as (-2, -300), (-1, -30), (0, -3), (1, -0.3), and (2, -0.03), illustrating how the y-values approach zero from the negative side as x increases.

Exponential functions are a crucial concept in mathematics, with applications in various fields such as finance, biology, and physics. This collection of examples aids in teaching the topic by providing visual and numerical representations of different exponential functions, including those with negative coefficients and negative exponents. Students can observe how these factors affect the graph's shape, the y-intercept, and the overall behavior of the function, developing a more comprehensive understanding of exponential relationships.

Presenting multiple worked-out examples is essential for students to fully comprehend exponential functions. By examining diverse cases, students can identify patterns, compare different functions, and gain a deeper insight into the behavior of exponential relationships. This approach helps reinforce key concepts and enhances students' ability to analyze and interpret exponential functions in various real-world scenarios, such as population decay, depreciation of assets, or cooling rates.

Teacher Script: "Now, let's look at this exponential function, y = -3 * 10^-x. How does it compare to our previous example? Notice the coefficient -3 and how it affects the y-intercept and the overall graph. Can you describe what happens to the y-values as x increases? This function also demonstrates exponential decay, but with a different starting point. How might we use this type of function to model real-world situations, such as the depreciation of a car's value over time?"

For a complete collection of math examples related to Exponential Functions click on this link: Math Examples: Exponential Functions Collection.