# SOLUTION: Determine whether graphs are perpendicular: 9x-8y=7 9y-8x=4 Are they perpendicular

Algebra ->  Algebra  -> Linear-equations -> SOLUTION: Determine whether graphs are perpendicular: 9x-8y=7 9y-8x=4 Are they perpendicular      Log On

 Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Algebra: Linear Equations, Graphs, Slope Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Linear-equations Question 278609: Determine whether graphs are perpendicular: 9x-8y=7 9y-8x=4 Are they perpendicularAnswer by edjones(7569)   (Show Source): You can put this solution on YOUR website!9x-8y=7 9y-8x=4 . 9x-8y=7 -8y=-9x+7 y=9x/8 - 7/8 . 9y-8x=4 9y=8x+4 y=8x/9 + 4/9 . No, because in order to be perpendicular m (slope) has to be the negative reciprocal of the slope of the other equation in the slope intercept form and these are not. . Ed .