Vertical and Horizontal Stretch of Functions
At about the 6:35 mark, the instructor miscopies a 4 as a 2. His answer for f(8) is 0, but should actually be -2.
In this lesson, the focus is on understanding the stretching that occurs in a transformation, and how to graph the function after the transformation. The two types of stretches discussed are vertical and horizontal. The lesson explains how to determine the type of stretch and how it affects the graph. The lesson ends with an example of plotting the graph after a transformation.
Describing a transformation with vertical and horizontal stretch then graphing
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- What changes can I make in a function to shift the graph up, down, left, or right?
- What changes can I make in a function to stretch or shrink a graph horizontally or vertically?
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Staff Review
The instructor summarizes how to alter an equation to shift a graph horizontally or vertically. He then summarizes how to stretch or shrink the graph. He plots some points on two different functions to illustrate what he is trying to explain.
