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

8-49.

On graph paper, graph Δ

*ABC*if*A*(−4, −3),*B*(−6, −1), and*C*(−8, −5).*8-49 HW eTool*What is

*AB*(the length of*AB*)?Reflect Δ

*ABC*across the*x*-axis to form Δ*A*′*B*′*C*′. What are the coordinates*B*′? Describe a function, (*x, y) →*(?, ?), that would map the coordinates of Δ*ABC*to Δ*A*′*B*′*C*′.

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