#### EssoExplJoe

##### New member

- Joined
- May 28, 2017

- Messages
- 2

Points: (Y

_{1},X

_{1}), (Y

_{2},X

_{2}), (Y

_{3},X

_{3}), (Y

_{4},X

_{4})

Points: (10,2), (5,4), (4,11), (4,15)

Four Equations with 4 variables:

a) Y

_{1}=a+bX

_{1}+cX

_{1}

^{2}+dX

_{1}

^{3}

b) Y

_{2}=a+bX

_{2}+cX

_{2}

^{2}+dX

_{2}

^{3}

c) Y

_{3}=a+bX

_{3}+cX

_{3}

^{2}+dX

_{3}

^{3}

d) Y

_{4}=a+bX

_{4}+cX

_{4}

^{2}+dX

_{4}

^{3 }I am searching for the solution and was hoping someone had already done this.