MA-945

Direct proportion

Lower Sec Maths · Secondary 2 · Hard · Direct proportion

Two variables

m

and

n

are related. Some values are:

m: 2, 4, 6, 8

n: 5, 9, 13, 17

Explain why

m

is directly proportional to

n

or not.

No, because $\dfrac{n}{m}$ is not constant for all given pairs.
Yes, because both $m$ and $n$ increase together.
Yes, because the difference $n-m$ is always 3.
No, because $n$ decreases when $m$ increases.

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