What rule was used to change numbers in the input column to numbers in the output column?

For the first row, Input = 182 and Output = 142.
Calculate the difference:

$$182 - 142 = 40$$

This suggests a rule of "subtract 40".

For the second row, Input = 152 and Output = 112.

$$152 - 40 = 112$$

This matches the output.

For the third row, Input = 122 and Output = 82.

$$122 - 40 = 82$$

This matches the output.

For the fourth row, Input = 92 and Output = 52.

$$92 - 40 = 52$$

This matches the output.

The consistent rule is to subtract 40 from the input to get the output.
Comparing this with the options:
a. subtract 30
b. subtract 40
c. add 30
d. add 40

The correct option is b.

The rule used to change numbers in the input column to numbers in the output column is b. subtract 40.