Answer:4.333.
Explanation:
To find the average rate of change over the interval [1,4], we can use the formula:
Average rate of change = (change in y)/(change in x)
In this case, the values of x and y are given in the table as follows:
x: 1 2 3 4
y: 8 14 17 21
So, the change in x over the interval [1,4] is 4 - 1 = 3, and the change in y is 21 - 8 = 13.
Plugging these values into the formula, we get:
Average rate of change = (13)/(3) = 4.333...
So, the average rate of change over the interval [1,4] is approximately 4.333.