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Closed Captioned Video: Algebra Applications: Data Analysis, 1
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Closed Captioned Video: Algebra Applications: Data Analysis, Segment 1: Introduction
In this introductory segment students learn about the mortage crisis of 2008. In the process they get a brief introduction to what a mortgage is.
Exponential Functions
Brief Review of Exponents
When a number is raised to a power, exponents are involved. Here are the key components of an exponential expression.
Exponents make it easier to write expressions that would otherwise be cumbersome to write. See how much easier it is to write 3^{10} instead of the expression on the right?
Exponents are a different form of writing numbers. With this new form come new properties that are unique to exponents. The next section goes over these properties, also known as the Laws of Exponents.
Laws of Exponents
The Laws of Exponents are a set of properties that pertain to all exponential expressions. Study the definition below.
To learn more about exponents, click on this link. It is a presentation that goes over the Laws of Exponents in more detail. To see examples that use the Laws of Exponents, click on this link.

Exponential Functions
An exponential function is of this form:
In this function the terms a, b, and c are numbers and x is the independent variable. Here’s one of the simplest exponential functions:
This is the graph of the function.
As you can see from the graph, the values of f(x) increase dramatically for small increases in input values of x. Here are some other examples of exponential functions.






Compound Interest
A special case involving exponential expressions is compound interest. What is compound interest? Usually, the context is of money earning interest in a bank account.
Here is the compound interest formula
This is the formula to use when the compounding periods are noncontinuous. Use this formula for continuous compounding:
To see examples of calculating compound interest, click on this link.

This is part of a collection of closed captioned videos for the Algebra Applications video series. To see the complete collection of the videos, click on this link.
Note: The download is Media4Math's guide to closed captioned videos.
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Video Transcripts
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Common Core Standards  CCSS.MATH.CONTENT.6.SP.B.5, CCSS.MATH.CONTENT.8.SP.A.1 

Duration  2.65 minutes 
Grade Range  6  9 
Curriculum Nodes 
Algebra • Probability and Data Analysis • Data Analysis • Data Gathering 
Copyright Year  2020 
Keywords  algebra, data analysis, math of money, financial math, mortgage crisis, Closed Captioned Video, time value of money, loan, loans, mortgage 