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4 votes
Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.

y=-2x+4
-5x+10y=5
A:Parallel
B:Perpendicular
C: Neither

User Grammilo
by
7.8k points

1 Answer

6 votes

y=-2x+4

the slope is -2


-5x+10y=5

solve for y

add 5x to each side

10 y = 5x+5

divide by 10

y = 1/2 x +1/2

the slope is 1/2


take the negative reciprocal of -2

- (1/-2) = 1/2

The two lines are perpendicular

User Pedrodbsa
by
7.5k points

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