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Suppose that `y` is directly proportional to `x` .

1) Find the constant of proportionality,` ` ` k`, if `y = 16.4` when `x = 2` .

Write your answer as a decimal.

`k =`

2) Using the `k` from above write the variation equation in terms of `x` .

`y =`

2) Using the `k` from above find `y` given that `x = 20` . Write your answer as a decimal.

`y =`

If needed, round to the nearest tenth.

8.2

`8.2 x`

164