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Are the lines y equals negative x minus 4 and 5x plus 5y equals 20 perpendicular explain your answer?
Wiki User
∙ 13y ago
y=-x-4
as this is in the form of y=mx+b, the slope of this line is -1.
5x + 5y = 20
x + y = 4
y = -x + 4
the slope of this line is -1.
Since the slope of each of the two lines are the same (-1) they are in fact parallel to each other, not perpendicular.
Wiki User
∙ 13y ago
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