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Chapter Contents

• Exponential & Logarithmic Functions
• 1. Definitions: Exponential and Logarithmic Functions
• 2. Graphs of Exponential and Logarithmic Equations
• 3. Logarithm Laws
• 4. Logarithms to Base 10
• 5. Natural Logarithms (base e)
• Dow Jones Industrial Average
• 6. Exponential and Logarithmic Equations
• World Population Live
• 7. Graphs on Logarithmic and Semilogarithmic Paper

• Comments, Questions?

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From the math blog...

World Population - Live Update

In the following Flash interactive, you can choose different years in the past and future and see what population growth was (and will be) like.

Click on the blue "choose year" button at the top right.

Assumptions

Most of the assumptions for this page are contained in the excellent source:

U.S Census Bureau

Of course, the population figures you see in the above Flash interactive are best-guess estimates.

You may also be interested in: 90% of those who ever lived, alive today?

Why "UTC time"?

UTC is the new name for what used to be called GMT (Greenwich Mean Time). It is the time in London (where 0 degrees longitude is located) during winter. In summer, London's time is one hour different to UTC time.

Interesting Fact...

The total population of the world in 1 AD was about the same as the population of the US today!

Concluding Remarks

We cannot continue to abuse the world like our forefathers did. They got away with it because of the smaller population, but we will not get away with it!

Go back to Exponential and Logarithmic Equations.