### Home > CC3 > Chapter 9 > Lesson 9.2.7 > Problem 9-149

9-149.

Use a graph to find the distance between the points *C*(−4, −1) and *D*(4, 1). *9-149 HW eTool* (Desmos). Homework Help ✎

Turn line *CD* into a right triangle, with legs parallel to the *x*- and *y*-axes.

Use the Pythagorean Theorem to find the length of the line segment connecting the two points.

8^{2} + 2^{2} = *c*^{2}

64 + 4 = *c*^{2}

68 = *c*^{2}

Complete the table in the eTool below to graph the points.

Click the link at right for the full version of the eTool: *CC3 9-149 HW eTool*