How do you tell whether the graphs of the pair of equations is parallel, perpendicular or neither for #4x+3y=6# and #3x-4y=7#? Algebra Forms of Linear Equations Equations of Parallel Lines 1 Answer Vinícius Ferraz Jul 12, 2015 #r \bot s# Explanation: #r: y = (6 - 4x)/3 = - 4/3 x + 2# #s: (3x - 7)/4 = y = 3/4 x - 7/4# #tan (90º - \theta) = - 1 / tan \theta# Answer link Related questions Are two lines with the same slope and y intercept considered to be parallel? Why does slope tell you if two lines are parallel? How do you write an equation of a line that is parallel to another? How do you know if two lines are parallel? How do you find the slope of a line? How do you find the slope of #2x+8y=9#? How do you write a line parallel to #y=-3/5x+2# and goes through point (0,-2)? How do you write a line parallel to #x=-5# and goes through point (1,-2)? What is the slope of the line that is parallel to #y=-4.75#? How do you write an equation of a line that is parallel to #y+3x=7# and passes through point #(7,2)#? See all questions in Equations of Parallel Lines Impact of this question 2044 views around the world You can reuse this answer Creative Commons License