Question

Hi, I totally forgot how to do line and slope, can someone help me out???

Answer 1

how do you want to be helped? do you have example problems?

Answer 2

Well, the first point on the graph is 1,2, the second is 0,-2

Answer 3

okay do you know how to find the slope of the line given two points?

Answer 4

no, that's why I'm here

Answer 5

mmk, i'm just asking

Answer 6

formula for slope is
change in y over change in x

Answer 7

so slope would be
(-2 -2) / (0 - 1)
which comes out to be 4
so the slope is four

Answer 8

oh, I get it now, I was looking online, but everything was too comlicated, thanks for the help

Answer 9

now we have the formula for a line
y = mx + b
where m is the slope and b is the intercept
put slope in
y = 4x + b
we are also given two points, since both points are on the line, you can pick either
say we pick the first one, plug it in for x and y
2 = 4(1) + b
b = -2

line is
y = 4x - 2

Answer 10

sure thing

Answer 11

that works, okay, that totally helps with homework, I'm glad i found this site

Answer 12

cheers

Answer 13

thanks for the help

Answer 14

no problem

Answer 15

alright, i have another question

Answer 16

hello????????

Answer 17

go ahead

Answer 18

so if the equation is (3,-2), (0,-3) then u would switch it around to (0,-2), (3,-3)????

Answer 19

??????

Answer 20

just because we are live, doesn't mean we are going to respond instantly

you can't switch them because you would be changing the points

Answer 21

then wat? I don't get it then.

Answer 22

then you find the slope, like we did in the first question
change in y over change in x

Answer 23

i still don't understand, i'm only in 7th grade

Answer 24

the question is find a line between (3,-2), (0,-3)
so find the slope
change in y over change in x
(-3 - -2)/ (0 - 3)
slope is 1/3
understand this?

Answer 25

wait, so its kinda like subtracting

Answer 26

yes
slope formula is
\[\frac{x1 - x2}{y1 - y2}\]
is this more clear?

Answer 27

i totaly get it now, OH, we did this last year in school, thanks!!!! (:

Answer 28

lol no problem
good luck

Answer 29

thanks