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Home > CC4 > Chapter 8 > Lesson 8.1.3 > Problem 8-49

  1. On graph paper, graph ΔABC if A(−4, −3), B(−6, −1), and C(−8, −5). 8-49 HW eTool (Desmos). Homework Help ✎

    1. What is AB (the length of AB)?

    2. Reflect ΔABC across the x-axis to form ΔABC′. What are the coordinates B′? Describe a function, (x, y) → (?, ?), that would map the coordinates of ΔABC to ΔABC′.

Use the Pythagorean Theorem to find the length of AB

When describing a function for a transformation, look at one point and its image and determine what changes happen to the x-coordinate and the y-coordinate.

Use the eTool below to answer the parts of the problem.
Click the link at right for the full version of the eTool: Int1 8-49 HW eTool