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timo86m
 2 years ago
Best ResponseYou've already chosen the best response.1just get a grid. make a x,y T table dw:1360036178869:dw And start plotting. THe more points the better and just draw a smooth fitting curve. And there is always google. Just paste an expression without the y= for example x^2

Azteck
 2 years ago
Best ResponseYou've already chosen the best response.0Well first, you got to move everything to one side so that it equals zero or you have to make y equal to zero. After that, you have to factorise and find the xintercepts. If you can't factorise it, then you have to use the quadratic formula to find the xintercepts. Then once you've done that, you have to find the yintercept. That would mean you have to make x equal to zero.

Azteck
 2 years ago
Best ResponseYou've already chosen the best response.0Afterwards, you can determine whether it is concave up or concave down. If it's concave up the coefficient of x^2 is positive. If the coefficient of x^2 is negative, then you know the curve is concave down. Then once you've done that, just run down a parabolic curve shape making sure you pass through those critical points.

Grazes
 2 years ago
Best ResponseYou've already chosen the best response.0I find the 135.. method easier ( http://mathpodcasts.blogspot.com/2008/12/parabolasepisode6using135pattern.html ) than finding the coordinates for all the x coordinates, but that's just me.

Azteck
 2 years ago
Best ResponseYou've already chosen the best response.0If you can't do that, then just do what @timo86m told you. That's probably the best way to sketch a curve if you're unsure of anything.

Grazes
 2 years ago
Best ResponseYou've already chosen the best response.0Note: if you do check the link and know what the a, b, and c are in the quadratic equation, you can skip to 4:11
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