Question

An equation for line k is y=-3/8x+5. An equation for line p is 8x + 3y = 10. Which best describes the relationship between line k and line p?


A. k || p

B. k ⊥ p

C. They are neither perpendicular nor parallel.

D. They are the same line.

Answer 1

isolate 'y' from her 8x + 3y = 10
in other words, express it in y=mx+c form

Answer 2

3y = -8x +10

Answer 3

is this correct?

Answer 4

correct so far, then ?

Answer 5

find the slopes...

Answer 6

if you can find the slopes,
and if m1=m2, lines are parallel,
m1*m2 = -1, lines are perpendicular,
else neither

Answer 7

if the equation comes out to be the same entirely, then they are same line.

Answer 8

So the answer is D ?

Answer 9

are the equations exactly same ?

Answer 10

not exactly

Answer 11

then its not D

Answer 12

They have the same slopes, so are they parallel then?

Answer 13

are you sure they have same slopes ?
what are the slopes according to you ?

Answer 14

No I am sorry my mistake, they dont

Answer 15

what about m1*m2 =-1
is this true ?

Answer 16

Yes

Answer 17

so is the correct answer B?

Answer 18

how ? can you tell me what m1=...? m2=.... ?

Answer 19

I am sorry. I am confused

Answer 20

you got -3/8 and -8/3 , right ?
now, -3/8 * -8/3 = 1
and not -1
so they are not perpendicular also.
hence, its 'They are neither perpendicular nor parallel.'

Answer 21

Ooh so the right answer is C?

Answer 22

yes.

Answer 23

Thank you very much :(

Answer 24

why thanks with a sad face ?

Answer 25

Thanks for clearing it up I kinda have a really hard time solving these problems:(

Answer 26

practice makes a man perfect ! (and women also :P)
so, keep practicing and you'll be good at it :)

Answer 27

Thanks for the support!!!! I REALLY appreciate it!!! :)