Question

Find the slope of the line that contains these points.
(3, 2) (5, 12)

Answer 1

does anyone know the answer

Answer 2

Plenty of people here know the answer... and if you 'listen' well, you will too :D
If you're given two points, (a,b) and (c,d), the slope of the line through them is given by this equation...
\[\Large m = \frac{d-b}{c-a}\]

Answer 3

So, in this case, your (a,b) is (3,2)
and your (c,d) is (5,12)

Just plug in and solve for the slope (m).

Answer 4

Confused?

Answer 5

no thanks I got it

Answer 6

Okay... what's your answer?

Answer 7

1,-7

Answer 8

Oh... no, those aren't the differences you need...
When you have an ordered pair, (x,y)
we call the left coordinate the x-coordinate
and the right coordinate the y-coordinates, right?

Your task is not to subtract the x and y coordinates, but rather,

Get the difference of their y coordinates, and get the difference of their x coordinates... can you do that?

Answer 9

so would that make it their oppisites

Answer 10

I can see how that might be confusing... let me put up an example...
Say we need the slope of the line through the points (1 , 7) and (3 , 21)

Their x-coordinates are 1 and 3
their y-coordinates are 7 and 21.

Get the difference of their x-coordinates, 1-3 = -2
AND the difference of their y-coordinates, 7-21 = -14

The slope is "difference of y-coordinates divided by the difference of x-coordinates"

So, it's -14/-2 = 7

Answer 11

thanks for mapping it out for me it helped