The table of values represents a polynomial function f(x). How much greater is the average rate of change over the interval [7, 9] than the interval [4, 6]?
x f(x) 4 105 5 384 6 945 7 1,920 8 3,465
9 5,760
Rate of change from 7 - 9 = [5760 - 1920 ] / [9 - 7] = 1920
Rate of change from 4- 6 = [945 - 105] / [ 6 - 4 ] = 420
1920 / 420 ≈ 4.57 times as great
Thanks, I really appreciate you helping me.
No prob.....!!!
+476 
