Question 684925
First, solve each line for y, to put into slope intercept format as y=mx+b.
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5x - 6y = 19
6y = 5x - 19
y = {{{(5/6)x - 19/6}}}
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6x + 5y = -30
5y = -6x - 30
y = {{{(-6/5)x - 30/5}}}
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The slopes are {{{5/6}}} and {{{-6/5}}}, which are negative inverses/reciprocals.  
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Perpendicular lines have negative inverse/reciprocal slopes.
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Parallel lines have the same slope.
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These are B, perpendicular.
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