SOLUTION: Determine whether the graphs of the equations are perpendicular lines. {{{y=-4x + 3}}} and {{{4y + x = -1}}}

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Question 830486: Determine whether the graphs of the equations are perpendicular lines.
and

Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
Put the second equation into slope-intercept form. Now compare the slopes of the two equations.





The slope of this equation is -(1/4), and slope of the first equation, already given in slope-intercept form, is -4.
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What is their product?

YES, the equations are perpendicular. (product of the two slopes is Negative One).

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