Question

Write an equation in slope-intercept form for the line that contains each pair of points.

Answer 1

Here is a pair of points, (3,4),(-1,-2)

Answer 2

please help

Answer 3

so are you trying to find the slope

Answer 4

Well, I did y2-y1/x2-x1 but thats not the answer

Answer 5

the answer in the back of the book says its y=3/2x-1/2 but idk how they got it

Answer 6

they got 3/2x by using the y2-y1/x2-x1

Answer 7

how?

Answer 8

just plug them in
what is y2

Answer 9

4

Answer 10

y2-y1

Answer 11

i did 4--2/3--1 =6/4

Answer 12

simplify 6/4 =3/2

Answer 13

;l

Answer 14

where did the 1/2 come from

Answer 15

use the slope formula now

Answer 16

y=mx+b

Answer 17

do i plug in 3/2?

Answer 18

yes

Answer 19

3/2 goes on m which is the slope

Answer 20

am a little lost on how to do that

Answer 21

oh

Answer 22

y=3/2x+b

Answer 23

yes now you need to plug in one cordenate in that formula
the x an y

Answer 24

i dont understand

Answer 25

from the start you had 2 coordinates right

Answer 26

yes

Answer 27

yes one of the then plug them in

Answer 28

x on x and y on y

Answer 29

4=3/2*3+b

Answer 30

because i used (3,4)

Answer 31

now solve for b which is the y-intercept

Answer 32

4= 4.5+b then i solve for b?

Answer 33

first don't mix decimals and fractions we want to get fraction so we leave is as fraction

Answer 34

which is 3/2 * 3/1 = 9/2

Answer 35

then substract 9/2 from 4/1 right

Answer 36

b= -1/2

Answer 37

wait where did 4/1 come from

Answer 38

4/1 is another way of saying 4
it was on the outside remember

Answer 39

it was 4=9/2x+b

Answer 40

is the the Y on (3,4)
Y=mx+b

Answer 41

i feel so stupid its just not clicking in my brain

Answer 42

4=9/2+b

Answer 43

so then you subtract 9/2

Answer 44

we already used the x to multiply 3/2*3 =9/2

Answer 45

from both sides?

Answer 46

yes

Answer 47

we want to make b by its self so usbstract 9/2

Answer 48

so then its y=9/2x -1/2

Answer 49

no

Answer 50

3/2 myy

Answer 51

3/2 is the slope

Answer 52

3/2 yes my bad

Answer 53

y=3/2-1/2

Answer 54

thank you sso much

Answer 55

i mean y=3/2x-1/2

Answer 56

your welcome

Answer 57

you're a life saver tysm

Answer 58

here is helpfull video if you don't get it
http://www.virtualnerd.com/algebra-1/linear-equation-analysis/y-intercept-from-point-slope-form.php

Answer 59

it explains it better

Answer 60

bye

Answer 61

ok thank u