Question

If n varies directly as m . Find constant of variation. m = 3, n = 12 *
​

Answer 1

Here is your answer
It is given that n varies directly as m i.e. When m = 3, n = 12. So, the equation of variation is n = 4m.
Hope it helps
Kindly mark me as brainliest
Thank you

Answer 2

Answer:

It is given that n varies directly as m i.e. n∝m.

∴ n = km, where k is constant of variation

When m = 3, n = 12.

∴ 12 = k × 3

⇒ k = 4

So, the equation of variation is n = 4m.

When m = 6.5,

n = 4 × 6.5 = 26

When n = 28,

28 = 4n

⇒ n = 7

When m = 1.25,

n = 4 × 1.25 = 5