Question

What is the direct variation equation if y varies directly with x, and `y=2` when `x=4`?

Answer 1

`y` varies directly with `x`

`=> y = kx`

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if `x = 4`, then `y = 2`

`=> 2 = k(4)`

#=> 4k = 2

`=> k = 1/2`

`=> y =1/2x`