Okay so I have three questions like this but I will only post the one! I have to find the polynomial equation that matches the data set. In class we are learning how to determine if the equation is linear, quadratic, cubic, quartic, etc. using the differences so I think that may be where I need to go but I tried finding the first, second and third differences to see if it was linear, quadratic or cubic but the last point doesn't fit. Should I graph this and go from there or am I missing something?
Given:
X Y
-3 -21
-2 -8
-1 1
0 6
1 7
2 4
3 -3
Given:
X Y
-3 -21
-2 -8
-1 1
0 6
1 7
2 4
3 -3