Unit Plan
Texas Education Agency

Texas Gateway: Transformations of Exponential and Logarithmic Functions

For Students 9th - 10th Standards
Given an exponential or logarithmic function, the student will describe the effects of parameter changes.
Activity
Texas Instruments

Texas Instruments: Logarithmic Functions

For Teachers 9th - 10th Standards
These questions test knowledge of the definition of a logarithm, domain and range of logarithmic functions, and properties of logarithms. Questions are true/false and multiple-choice; solutions are provided.
Handout
Math Notes and Math Tests

Pre Calculus Notes: Logarithmic (Log) Functions and Their Graphs [Pdf]

For Students 9th - 10th Standards
The resource from a professor at San Diego Mesa College investigates logarithmic functions and their graphs. Topics examined are common logs, basic log properties, and domains of logarithmic functions. Class notes and examples are included.
Activity
Richland Community College

Richland Community College: Logarithmic Functions

For Students 9th - 10th Standards
This site from Richland Community College includes basic definition, properties, and graph of the logarithmic function.
Handout
Math Medics

S.o.s. Math: Exponential and Logarithmic Functions /Radioactive Decay

For Students 9th - 10th Standards
A set of examples and exercises that show how to solve radioactive decay problems by using exponents and logarithms.
Activity
Math Medics

S.o.s. Math: Exponential and Logarithmic Functions / Amortization

For Students 9th - 10th Standards
A set of examples and exercises that cover how to solve mortgage problems by using exponents and logarithms.
Handout
University of Guelph

University of Guelph: Logarithms

For Students 9th - 10th Standards
Exceptional page explaining almost anything you might want to know about logarithms.
eBook
CK-12 Foundation

Ck 12: Algebra Ii: 3.8 Solving Logarithmic Equations

For Students 9th - 10th Standards
This section addresses how to solve different types of logarithmic equations. It explores how to condense expanded equations and how to convert logarithmic equations into exponential ones.
Activity
Math Medics

S.o.s. Math: Properties of Logarithms

For Students 9th - 10th Standards
Site provides the many properties of logarithms, including common and natural logarithms. Also gives examples and formulas for each.
Handout
Other

Brown Math: It's the Law Too the Laws of Logarithms

For Students 9th - 10th
The laws of logarithms (which flow directly out of the laws of exponents) are discussed here. Combining logs with the same base and the Change of Base Formula are also explained in straightforward language for the reader.
eBook
CK-12 Foundation

Ck 12: Algebra Ii: 3.7 Properties of Logs

For Students 9th - 10th Standards
This section explores the properties of logs. More specifically, it investigates how to apply these properties to simplify and expand logarithmic expressions, and to convert between expressions in logarithmic and exponential forms.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Snail Invasion

For Teachers 9th - 10th Standards
In this task, students investigate the power of exponential growth in this real-world example of an invasive species that was introduced to Florida in 1966, a giant snail. Aligns with F-LE.A.2 and F-LE.A.4.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Newton's Law of Cooling

For Teachers 9th - 10th Standards
For this problem, students use an exponential equation to investigate the cooling of a cup of coffee and how long it would take for it to cool down to different temperatures. Aligns with F-LE.B.5 and F-LE.A.4.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Bacteria Populations

For Teachers 9th - 10th Standards
This task provides a real-world context for interpreting and solving exponential equations. Students are asked to examine the equations representing the growth of three colonies of the bacterium that causes pneumonia, each colony being...

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