Final answer:
The pattern for the 1st difference in the sequence 0, 1, 4, 9, 16... is to increase by a factor of 2.
Step-by-step explanation:
The pattern for the 1st difference in the sequence 0, 1, 4, 9, 16... is to increase by a factor of 2. This means that each term in the sequence is obtained by squaring the corresponding term number. For example, the first term (0) is obtained by squaring 1, the second term (1) is obtained by squaring 2, the third term (4) is obtained by squaring 3, and so on.