Determine which type of rule is represented in the table. What are the missing values?

x | 4, 8, 12, 16
y | 8, __, __, 20

The rule seems to be adding 4 to the x-values to get the corresponding y-values.

The missing values would be:

y | 8, __, __, 20

To find the missing values, we can apply the rule of adding 4 to the x-values:

When x = 8, y = 8 + 4 = 12
When x = 16, y = 16 + 4 = 20

So, the missing values are 12 and 12.