Question

Indicate whether the line PQ is parallel, perpendicular or neither to a line with a slope of -3. P (2, 5), Q (5, 6)

Answer 1

Find the slope first

Answer 2

\[m= \frac{y2-y1}{x2-x1}\]

Answer 3

Hey soos,Put the brackets too \[m =\frac{ (y2-y1) }{( x2-x1) }\]

Answer 4

@uri i did that and got 1/3

Answer 5

6-5
----
5-2

1/3 Right..

Answer 6

Right, that's what you should get. So 1/3 is your slope of that line. So, parallel lines have the same slope, which of course this isn't -3. But perpendicular slopes are what they would call negative reciprocals of each other.
By negative reciprocal, that means you change the sign and then flip the number upside down. So for -3. Changing the sign means positive 3. Flipping it upside down means making it 1/3. So since 1/3 is the negative reciprocal of -3, they are perpendicular lines.

Answer 7

Didn't see you typing @uri x_x

Answer 8

I know it wasn't appearing.

Answer 9

The user asked for uri so I just butted out

Answer 10

@Luigi0210 nononononono you explain.

Answer 11

Ignore me then xD

Answer 12

I'm out!

Answer 13

@uri this is your question now :3

Answer 14

thank you @Psymon that helped me a lot

Answer 15

Yeah, np :3