How do you find the equation of parabola from 3 given points using a TI-83 graphing calculator?

Question

I did it once, but I forgot....you plug in the three coordinates into some kind of table and it generates the values of a, b, and c in the form ax^2+bx+c.

Answer 1

I think it's the linear regression solver?

There's a tutorial here:

http://online.redwoods.cc.ca.us/instruct/kiyokoya/linreg/

and another here:

http://fym.la.asu.edu/~tturner/MAT_117_online/Regression/Linear%20Regression%20Using%20the%20TI-83%20Calculator.htm

Answer 2

placed both graphs in (press blue y= button) then click shift and then hint and a collection of stuff ought to arise and click the only which announces intersect (i imagine that's #5) and merely click enter like 3 cases i imagine and it would provide you with factors of intersection.