Question

Plot the three points P = (1,3), Q = (5,6), and R = (11.4,10.8). Verify that PQ = 5, QR=8, and PR = 13. What is special about these points?

Answer 1

@zepdrix

Answer 2

did you plot the points?

Answer 3

yes

Answer 4

can you show the plot?

Answer 5

well i would have to take a pic cuz i drew it on my notebook

Answer 6

oh ok

Answer 7

it actually looks like it might be collinear points but i am not so sure

Answer 8

well if you draw them it should be obvious if there collinear

Answer 9

they should line in one line

Answer 10

the thing is that i am not sure how to prove that its collinear

Answer 11

if not then they are not collinear

Answer 12

use vectors

Answer 13

you can draw a line through them

Answer 14

if you can then they are!

Answer 15

from P to Q it would be: [4,3]

Answer 16

yes make another vector

Answer 17

from Q to R?

Answer 18

yeah

Answer 19

[6.4, 4.8]

Answer 20

you just need to show one vector is a multiple of the other

Answer 21

they are multiples because the scalar would be 1.6

Answer 22

then that is enough to prove they are collinear

Answer 23

thank you! can u help me with two more questions please?

Answer 24

no problem

Answer 25

ok let try