Question

If y is directly proportional to x and y is 12 when x = 10, what is the function rule that describes the variation?

Answer 1

F(x) = 6/5x

Explanation:

the person below just placed it in decimal form if you make it a fraction you will see that you get 6/5 so he did give the answer...

Answer 2

Answer:
`y=1.2x`

Explanation:

Given

Y is directly proportional to x

and y=12 for x=10

`\Rightarrow y\propto x\\\Rightarrow y=kx\\\text{Substitute x and y}`

`\Rightarrow 12=k(10)\\\Rightarrow k=1.2`

`\therefore \text{The function becomes}\\\Rightarrow y=1.2x`