I) 1 mg = a
g

ii)
b
mg = 1 g

iii) 1 kg =
c
g

iv)
d
kg = 1 g

v) 1 tonne =
e
kg

vi)
f
tonnes = 1 kg

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Step-by-step explanation:

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.