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Home > AC > Chapter 11 > Lesson 11.1.2 > Problem 11-23

11-23.

Marley thinks that the two lines below are perpendicular, but Bob thinks they are not. Who is correct and how do you know? Homework Help ✎Gerald biking to his grandmother' title=

2x − 7y = 16
7x + 2y = 3

Rearrange the equations into slope intercept form. If the slopes
are opposite reciprocals of each other then the lines are perpendicular.