Question

reaSon out uSing slopes that A(-3,9), B(1, -9), C(7,6) are lying on the Same line

Answer 1

\[m=\frac{\Delta y}{\Delta x}\]

Answer 2

if you have two points (x1, y) and (x2, y2), the slope of the line connecting them is defined as:
slope = (y2-y1)/(x2-x1)

so use this to show the slope between A and B is the same as the slope between B and C

Answer 3

tnx

Answer 4

yw

Answer 5

i cant get it :(

Answer 6

ok - first work out the slope of the line from A to B - what answer do you get for that?

Answer 7

0

Answer 8

It's not 0 :-P

Answer 9

im sorry th A (-3, -9)

Answer 10

right then it is 0 :-D

Answer 11

ok - are you sure you have all the points stated correctly?

Answer 12

w8 ill check it

Answer 13

reaSon out uSing slopes that A(-3,-9), B(1, -9), C(7,6) are lying on the Same line

Answer 14

well for these 3 points, they definitely do not lie on the same line

Answer 15

then

Answer 16

you can "see" from the diagram that they do not lie on the same line. The slope of the line from A to B is zero, and the slope of the line from B to C is NOT zero - therefore they do not lie on the same line.

Answer 17

ahh ok thanks a lot :)

Answer 18

np

Answer 19

given the verticeS P(-5,2), Q(-1,-5), R(9,10) prove uSing Slopes that PQR is a right triangle