Question

how do i do this: write an equation in slope intercept form as the line described; has the same slope s 3x-y+4=0 and contains the point(2,-3) ??

Answer 1

i dont get it tho :(

Answer 2

i dont know how!!

Answer 3

general line eqn: ax+by+c=0
If two lines are parallel, their a n b will be the same
so how would the new equation looks like?

Answer 4

i have no idea cuz i dont even know whats the 'b' in this problem!

Answer 5

Why not? The question says the new line is parallel to the line given right?

Answer 6

"general line eqn: ax+by+c=0
If two lines are parallel, their a AND b will be the same"

Answer 7

no it doesnt say anything about the new line being parallel!

Answer 8

OK sorry my fault - parallel means has the same slope :)

Answer 9

ohhhhh okay let me c now. hold on

Answer 10

ummm i still have NO IDEA what to do

Answer 11

Read what I said above and give me a while guess on how the new eqn will look like plz?

Answer 12

wat am i supposed to do exactly tho? plug in numbers or wat?

Answer 13

The plan is to use the given condition of the new line has the same slope to write out the new formula; then plug in the numbers given to find c

Answer 14

i did plug the numbers in and i came up w/13=0. tht makes NO SENSE.

Answer 15

no no no...ok lets say new eqn is ax+by+c=0
then it has same slope as 3x-y+4=0

with me so far?

Answer 16

yes

Answer 17

Two lines with same slope have the same a and b so....

Answer 18

wats a and b?

Answer 19

a and b are constants in the eqn ax+by+c=0

Answer 20

is ax+by+c=0 the equation for finding an equation that has the same slope as this problem?

Answer 21

ax+by+c=0 is the new equation the question is asking for but u need to find a, b and c.

Answer 22

okay

Answer 23

now what else do i do?

Answer 24

Two lines with same slope have the same a and b

Answer 25

okay

Answer 26

new eqn is ax+by+c=0
then it has same slope as 3x-y+4=0
so what are a and b in this case?

Answer 27

ummm i dont know

Answer 28

Please read what I have just said in my two posts above.

Answer 29

um im guessing tht a and b r the coordinates for a point

Answer 30

x+y+4=0 is an eqn; so is 3x-5y-9=0 or -x+4y-2=0
they all have different a and b....first one a=1, b=1. second one a=3, b=-5. last a=-1, b=4.

Answer 31

oh i get it! so wat do i do after?

Answer 32

new eqn is ax+by+c=0
then it has same slope as 3x-y+4=0
so what are a and b in this case?

Answer 33

theyre the constant right?

Answer 34

YES :)

Answer 35

and then...

Answer 36

Show me what u think the new eqn looks like plz?

Answer 37

3(2) -(-3) +4=0???

Answer 38

How do u know the constant c? i only said a and b are the same...

Answer 39

oh never mind it would be 3(2)-(-3)+4=0 right?

Answer 40

Please read "How do u know the constant c? i only said a and b are the same..."

Answer 41

cuz its given to me. they already put 4 as the number

Answer 42

But thats the old eqn, new eqn the Q is asking is ax+bx+c=0 and u find a and b because it has the same slope as 3x-y+4=0. We do not know what c is....

Answer 43

Do u understand that?

Answer 44

would it be the same thing i told u b4 without the +4 tho?

Answer 45

It is not the same because it is a different line eqn >.<

Answer 46

i have no idea wat u r talking about, srry

Answer 47

Will u take me up on my word that u dont know the value of c and write out in x, y term what the new eqn is plz?

Answer 48

x-y=0

Answer 49

um i think it would be better if i asked my teacher tomorow in school. thanks though!!

Answer 50

Sorry I tried :(