perpendicular lines?

Question

perpendicular lines' slope are negative reciprocal right???
so does it mean it always has to be negative???
like.....
-1/2
does it have to be
-2???
or is just positive 2 correct??

Answer 1

Perpendicular line's slope are negative reciprocal!

line slope x perpendicular line slope = -1
perpendicular line slope = -1/line slope

If the line's slope is -1/2
then the slope for perpendicular line is -1/(-1/2) = 2

Answer 2

A perpendicular line to a given line whose slope is known has a slope that is the negative reciprocal of the known slope. So if the slope is 4/3 of the given line, the slope of the perpendicular will be -3/4.

It doesn't have to always be negative. If a line is moving down from left to right, it's slope will be negative. A line perpendicular to that line will be moving up form left to right and thus the slope will be positive.

If the known slope is -1/2, the perpendicular slope is +2/1 or +2.

Answer 3

No, it doesn't have to always e a negative number.

Being the "negative reciprocal" means that if the slope of one of your lines is already negative, you take the negative of that number and that becomes positive.

Always remember that for slopes of two perpendicular lines, one is always a positive number and the other is a negative number.

Answer 4

If a line has a slope of
-1/2
Then a perpendicular line has a slope of
+2
The negative reciprocal of
-1/2 is +2
+1/10 is -10
-0.125 is +8
+0,5 is -2

Answer 5

if one line's slope is -1/2 the slope of another line perpendicular to the first is 2.

for line with slope m, line with perpendicular slope is -1/m
so find the reciprocal of the number then multiply by negative one
remember: any positive number multiplied by a negative number is negative
any negative number multiplied by a negative number is positive

Answer 6

You can remember easily that the product of slopes of 2 perpendicular lines is -1. Just multiply the slopes and if it comes out -1 then the lines are perpendicular.

Answer 7

positive two is correct. if the slope of a line is negative, for example -3, then its negative reciprocal is -(-1/3). so it becomes +1/3.

Answer 8

Example 1
Line y = 2x has m1 = 2
Perpendicular line has m2 = - 1/2

Example 2
y = - (1/4).x + 5 has m1 = - (1/4)
Perpendicular line has m2 = 4

Example 3
y = (3/5).x + 4 has m1 = 3/5
Perpendicular has m2 = - 5/3

Rule for perpendicular lines is m1 x m2 = - 1

Hope these examples help.

Answer 9

problematic task search from google just that could actually help

Answer 10

Perpendicular lines are lines that intersects than has a right angle.