### Home > GB8I > Chapter 7 Unit 8 > Lesson INT1: 7.2.2 > Problem 7-104

7-104.

Without graphing, determine which of the following equations represents lines that are parallel to each other. Which are perpendicular? Show how you know.

Put each equation into slope-intercept form

(, where

*is the slope and*

*is the*

*-intercept). That means to solve for*

*.*

Compare the slopes.

If they are equal then they are parallel.

If they are the negative reciprocal of each other then they are perpendicular.