Question

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Which equations show direct variation between u and v?

Choose all answers that are correct.

A. V = 1/u + 6


B. v/u = 9


C. 0.5 (1/u) = V


D. 3.5u = V

Answer 1

You can think of u direct variation with v when: if v increases than u increases linea

Answer 2

so then it would be d and a?

Answer 3

the first one, when u increases, V decreases

Answer 4

oh

Answer 5

@gelow

Answer 6

the second one, we have:
\(v = 9u\), so when u increases, v also increases linearly by a factor of 9

Answer 7

what you think about C and D?

Answer 8

thanks for you help and i think

Answer 9

i think d could be right because u is multiplying 3.5 so it would be increasing v by 3.5 right?

Answer 10

that's correct! and about option C?

Answer 11

it wouldnt be right because it is dividing so it would be decreasing

Answer 12

No... when u increases, v decreases, so it's not proportional directly variation...

Answer 13

oh. i though it was proportional.

Answer 14

proportional is when if u increases, v also increases. Otherwise it's non proportional

Answer 15

ok

Answer 16

so was i right when i said it is a and d

Answer 17

i have another question because i figured this one out

Answer 18

that's right, it's A and D