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# How write an equation for a curve in the form y=f(x)? watch

1. I was doing C1 jun 2008 when on Q11 b) I struck on how write in form y=f(x).

The equation for curve c that i got was y= 1/3x3 + 6x -9x-1 -1
2. (Original post by Cake_Chan)
I was doing C1 jun 2008 when on Q11 b) I struck on how write in form y=f(x).

The equation for curve c that i got was y= 1/3x3 + 6x -9x-1 -1
All it means is find y as a function of x. That is, express y in terms of x, which you have. Your answer is fine.

Hope that helps.
3. (Original post by Cake_Chan)
I was doing C1 jun 2008 when on Q11 b) I struck on how write in form y=f(x).

The equation for curve c that i got was y= 1/3x3 + 6x -9x-1 -1
that is ok
4. (Original post by Cake_Chan)
I was doing C1 jun 2008 when on Q11 b) I struck on how write in form y=f(x).

The equation for curve c that i got was y= 1/3x3 + 6x -9x-1 -1
That is of the form y=f(x).
5. Ignore my last (deleted) post. I didn't read the initial post properly.

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Updated: February 11, 2016
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