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Another quadratics question. - HSN forum

### #1louisa567

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Posted 16 November 2006 - 08:44 PM

Ive been given 3 questions for homework. You must state the equation in the form y = ax^2 + bx + c.

I have managed to do the first one using the sites notes but the other 2 wont work out!

First I am given a graph which cuts at (0,18) and (2,5). I begin with y = a(x-2)^2 + 5. Is this correct?

Any ideas would be really appreciated.

### #2John

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Posted 17 November 2006 - 03:04 PM

You are correct.

Now what you need to do is subsitute x and y for the co-ordinate (0,18).

And then solve for a.

Tell me what you get for your answer and I'll let you know if it is correct.

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