Question

write an equation in the form y=mx+b for the line which passes through (1,-10) and (-7,-2)

Answer 1

First we need to find the slope any ideas on how to find it?

Answer 2

ok know how to do that
give me a min

Answer 3

slopes -1

Answer 4

ok next are you fimilar with the point slope formula?

Answer 5

not really can you remind me

Answer 6

\[\huge~y-y_1=m(x-x_1)\]
m=slope int his case -1
next we select any random post lets go with
(1,-10)
so 1 = x1
-10=y1
now you just plug it into the formula

Answer 7

Are you ok with that? Do you know how to do it?

Answer 8

stuck? :/

Answer 9

a little

Answer 10

\[\huge~y--10=-1(x-1)\]

Answer 11

therefore we have
\[\huge~y+10=-1(x-1)\]
now distribute
\[\huge~-1(x-1)\]

Answer 12

8

Answer 13

huh?

Answer 14

hold on messed up bad not smart at algebra at all

Answer 15

need help? :)

Answer 16

yes i need all the help i can

Answer 17

therefore we have
\[\huge~y+10=-1(x-1)\]
now distribute
\[\huge~-1(x-1)\]

Answer 18

distribute :)

Answer 19

-1 * x = ?
-1 * -1 =?

Answer 20

any thing that x right

Answer 21

-1x :)
-1 * -1= ?

Answer 22

1

Answer 23

good so we have
\[\huge~y+10=-1x+1\]
we are trying to isolate y so what would the next step be?

Answer 24

so what your saying is get rid of 10 or change y

Answer 25

get rid of the 10

Answer 26

do i subtract 1 from 10

Answer 27

yes so
1-10= ?

Answer 28

-9

Answer 29

good so we get
\[\huge~y=-1x-9\]
thats all :)

Answer 30

thank you thank you thank you :)

Answer 31

:)

Answer 32

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