Question

Which of the following pairs of equations represent perpendicular lines?
A. y = 4x + 2 and y = 1/4x + 1
B. y = 3x + 5 and y = -3x - 5
C. y = 2x - 7 and y = -1/2x + 4
D. y = 5x - 14 and y = -5x - 14

2. Given the equation y = 2x -5, which of the following ordered pairs is a solution?
A. (10, 25)
B. (0, -5)
C. (4, 1)
D. (1, 3)
@iGreen.

Answer 1

Perpendicular lines have opposite slope..so which of those options have opposite slopes?

Answer 2

B

Answer 3

No, that's not right..

For the slope of 3 to be opposite, it must be flipped around and changed to negative.

3 is the same thing as 3/1, so flipping it around will give us 1/3, and making it negative will give us -1/3.

Answer 4

But the 2nd one has -3..so B is wrong.

Answer 5

D

Answer 6

@@iGreen.

Answer 7

No..that's wrong also..it's the same exact thing as B..

Answer 8

then i really dont A?

Answer 9

*sigh*

No..that's wrong.

Answer 10

It's C because in the first equation, the slope is 2.

y = 2x - 7
^ Slope

Perpendicular lines have opposite slope. To make it opposite we flip it and make it negative.

2 is the same thing as 2/1, so if we flip it, it becomes 1/2, and making it negative makes it -1/2.

And the 2nd equation has a slope of -1/2, so C is your answer.

Answer 11

I SUCK AT MATH

Answer 12

Lol