How DO i graph this? I know its a parabolic function or something...

I have the points but I dont know how to find the equation
For example the points are:
X: 100 1000 2000 3000
Y: 0 -1.22 -17.81 -94.75



Now how would one go about graphing this?

 

Graphing Calculator

 

yes thank you edison, so wise...

i need to find out the EQUATION not how to do it

 

ummm arent those your points? you have 4 points dont you just graph it

and the only formula for a line i know is y=mx+b and x-h+k



but then again im only in algIII and your most likely talking about something WAY over my head

 

well you can use the two farthest points and the 2nd and 3rd are just extra for precision/checking and its not super impossible i just can't remember my ALG II from high school

 

If you have an Iphone or an ipod touch, download "formul8" it's saved my *** a couple times, but good luck I suck at math, except calculates, for some reason i was really good at it.

 

y(sub)1-y(sub)2
----------------
x(sub)1-x(sub)2

but that's for a linear function and i don't thing that's linear, more like quadratic

 

yeah close but thats def linear, for quads i'm going to need ^2 but I can't remember the formula

 

I dont know how i would go about using the quadratic formula either since Its not a A/B/C equation its more of a X/Y