Question

Find a quadratic function to model the values in the table. Predict the value of y for x = 6.

X Y
-1 2
0 -2
3 10

Answer 1

by what methods?

Answer 2

x^2 a + x b + c = y

is the backwards looking but functional way to obtain values for the quadratic

Answer 3

rref{{(-1)^2,(-1),1,2},{0,0,1,-2},{3^2,3,1,10}}

this would amount to a matrix solution

Answer 4

Ok

Answer 5

http://www.wolframalpha.com/input/?i=rref%7B%7B%28-1%29%5E2%2C%28-1%29%2C1%2C2%7D%2C%7B0%2C0%2C1%2C-2%7D%2C%7B3%5E2%2C3%2C1%2C10%7D%7D

makes it easier

it looks like: 2x^2-2x+2 might be the solution

Answer 6

2x^2-2x-2

mistyped the last operator

Answer 7

What the 2nd part 58, or 60

Answer 8

2*6^2 -2*6 -2

i take it you have 2 options that differ only by the 58 or 60?

Answer 9

Yes

Answer 10

well, i found the quad, all you have to do is the simple math of it to get the end :)

Answer 11

Oh, Ok

Answer 12

72-14 if i see it right