help with this math problem

[alanreal]

 

[tkhunny]

It's a cubic. a + bx + cx^2 + dx^3 = y

 

[alanreal]

it says cubic on the problem.

It's a cubic. a + bx + cx^2 + dx^3 = y

it says cubic on the problem.

 

[tkhunny]

How did you use this information?

Substitute each x-value and corresponding y-value. If you keep them lined up, you will see the coefficient matrix and the right-side vector begin to form.