Unit
Radical Expressions and Equations
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
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MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
If you know the "parent" graph and some key features about the graph of y = root (x), then you can use transformation rules to sketch other square root functions. Here we look at reflections caused by adding negative signs. If there is a negative out in front of the radical, that causes all of the y-values to change sign, which shows up as a reflection across the x-axis. Conversely, a negative x under the square root shows up as a reflection across the y-axis. We confirm this by choosing an x-value to input. We also consider what this does to our domain (inputs) and range (outputs).
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