Question

put in slope intercept form
5x-4y=3 passes through (7,-5)

put in slope intercept form
2x-5y=9 passes through (2,-9)

Answer 1

r u trying to get y by itself ?

Answer 2

ya, but couldn't figure it out

Answer 3

thats not it, because its passing through a point

Answer 4

hold on i can do it

Answer 5

r u trying to fine Find the Perpendicular Line

Answer 6

no the slope intercept equation

Answer 7

the answer is y=-4/5x - 19/5
but i do not know how to get to it

Answer 8

what did you get for y when plugging in ( 7 , -5)?

Answer 9

is that the answer to the first or 2nd problem?

Answer 10

(-5)=-4/5(7) - 19/5
-5 = -28/5 - 19/5
-5 = -47/5
?

Answer 11

you need help on the first problem right?

Answer 12

No, it was a problem I had to do in my class, but I got it wrong and I want to know how to solve it

Answer 13

yup

Answer 14

the answer to the first one is wrong, it is supposed to be \[y=\frac{ 5 }{ 4 }x-\frac{ 55 }{ 4 }\]

Answer 15

\[5x-4y=3\]

\[-4y=3-5x\]
\[y=\frac{ 5 }{ 4 }x-\frac{ 3 }{ 4 }\]

Answer 16

Looking at y=mx+b (slope intercept form), m = 5/4

Answer 17

Plug m into the slope intercept form, \[y=\frac{ 5 }{ 4 }x+b\]

Answer 18

\[-5=\frac{ 5 }{ 4 }(7) + b\] Plugging in ( 7, -5) in.

Answer 19

-55/4?

Answer 20

we need to isolate b, so subtract 35/4 to the other side of -5 to get \[-5-\frac{ 35 }{ 4 }=b\]

Answer 21

yes and that is b.

Answer 22

now, since we found b (b = -55/4) and the slope m ( m=5/4), plug it into the slope-intercept formula to get y=(5/4)x-55/4

Answer 23

oh ok

Answer 24

The purpose of the first part is to find the slope of m. Once you found the slope of m. Use the slope-intercept formula y=mx+b, plug in m, after plug in the given points to find b. Then after all is found, just plug m and b into y=mx+b.

Answer 25

ok

Answer 26

you said the answer was -4/5x-19/5?

Answer 27

y=5/4x-55/4

Answer 28

ya thats what my teacher said

Answer 29

and that is for the first problem correct?

Answer 30

yup

Answer 31

I think your teacher made a mistake lol

Answer 32

Well he marked it wrong on my test :(

Answer 33

Show your work to another teacher, you are guaranteed to get your points back due to the teacher making a mistake.

Answer 34

ok, thanks

Answer 35

do you need help for the 2nd problem?

Answer 36

No, I know how to do it now

Answer 37

Thanks :D

Answer 38

okay no problem, be sure to talk to that teacher or to some authority though. Those points taken off is invalid.