Question 156217
2x-7y=5 and 2y-7x=7
:
Put both equation into the slope/intercept form
-7y = 5 - 2x
7y = 2x - 5; multiplied equation by -1
y = {{{2/7}}}x - {{{5/7}}}
and
2y = 7x + 7
y = {{{7/2}}}x + {{{7/2}}}
:
not parallel, they have different slopes
:
slope relationship for perpendicular lines: m1 * m2 = -1
{{{2/7}}} * {{{7/2}}} = +1, so not perpendicular either