Question

Which of the following correctly describes the variation in the equation r=d/t?

1. r varies inversely with d and jointly with t
2. r varies jointly with t and d.
3. r varies inversely with t and jointly with d.
4. r varies directly with d and inversely with t.

Answer 1

As t gets bigger, r gets smaller, so r is inverse to t...

Answer 2

as d gets bigger, what happens to r?

Answer 3

Thank you, sorry I'm new to this

Answer 4

R gets bigger too?

Answer 5

Right
, so is it inverse or jointly?

Answer 6

must be jointly

Answer 7

Bingo

Answer 8

so just to clarify, inversely means not both of them get bigger and jointly means both get bigger?

Answer 9

inverse means it does the opposite

Answer 10

Alright can I ask you another question? It's the same type

Answer 11

OK

Answer 12

Which of the following correctly describes the variation in the equation r= L/pt

Answer 13

it looks exactly the same but there isnt an answer that's the same

Answer 14

the answers are
1. r varies jointly with l, p, and t
2. r varies directly with l and inversely with p and t
3. r varies directly with l and jointly with p and t
4. r varies inversely with l and jointly with p and t

Answer 15

Im thinking its the second one

Answer 16

Well, how is r related to L?

Answer 17

when r gets bigger l gets bigger, right?

Answer 18

Right, so its related how?

Answer 19

directly or inversely?

Answer 20

directly

Answer 21

why shouldnt i use jointly though? besides the reason that the answer wont make sense

Answer 22

then what happens if you change p or t?

Answer 23

they mean the same thing

Answer 24

oh, okay. then p or t vary inversely with r.

Answer 25

You got it.

Answer 26

Thank you so much

Answer 27

No problem