Based on the given table, we can observe that as the number of hours increases from 1 to 4, the number of pizzas made also increases from 4 to 8. However, the ratio of pizzas made to hours is not constant.
In order to determine if the relationship between the number of pizzas made (y) and the number of hours (x) is proportional, we can calculate the constant rate of change.
The constant rate of change is calculated by finding the difference in y-values divided by the difference in x-values for any two points on the table. Let's choose the first and second data points (1, 4) and (4, 8):
Change in x (Δx) = 4 - 1 = 3
Change in y (Δy) = 8 - 4 = 4
Constant rate of change = Δy / Δx = 4/3
Since the constant rate of change is not equal to a constant value (in this case, 4/3), the relationship is not proportional.