Understanding Absolute Value Equations and Graph Translations
This activity focuses on graphing absolute value equations by exploring how translations affect their position. Students will graph the basic function y = |x| and then examine the effects of vertical translations by graphing y = |x| + 2. They will compare the graphs and understand the concept of translations, which shift the graph without altering its shape. Vertical translations will be practiced with examples like y = |x| + 4 and y = |x| - 5, followed by horizontal translations, such as y = |x - 4| and y = |x + 1|. Homework will solidify these concepts.
Understanding Absolute Value Equations and Graph Translations
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Presentation Transcript
6-8: Graphing Absolute Value Equations Objective: To graph absolute value equations by using translation
Absolute Value Equations • ACTIVITY • Graph: y = IxI • Now, graph: y = IxI + 2 • Describe how the graphs are the same and how they are different.
Translation • = a shift of a graph horizontally, vertically, or both. The result is a graph of the same shape and size, but different position.
Vertical Translation • A shift of the absolute value equation up or down. • The graph of y = IxI + k is a translation of the graph y = IxI. Let k be a positive number. So, y = IxI + k translates the graph of y = IxI up k units while y = IxI-k translates the graph of IxI down k units.
Practice Vertical Translation • Graph: • y = IxI + 4 • y = IxI – 5
Horizontal Translation • Translation left and right • For a positive number h, y = Ix + hI translates the graph of y = IxI by h units to the left and y = Ix – hI translates the graph of y = IxI by h units to the right
Practice horizontal translation • y = Ix-4I • y = Ix+1I • y = Ix+8I • y = Ix-6I • Write an equation for each translation: • 5 units right 7 units left 3 units up
Homework • P361-362 #1-35 ALL