a Find the cubic function that is the best fit for the data in the table below b Find the quartic function that is the best fit for the data in the table X y 1 4 2 0 3 10 4 30 5 5 6 190 7 1500 a The cubic function is y 36 639x 350 583x 980 063x 724 857 Simplify your answer Use integers or decimals for any numbers in the expression Round to three decimal places as nee