Tell whether the sequence is arithmetic. 3 7 12 18

To determine whether the sequence 3, 7, 12, 18 is arithmetic, we need to check if the differences between consecutive terms are constant.

The difference between the second term (7) and the first term (3) is 7 - 3 = 4.
The difference between the third term (12) and the second term (7) is 12 - 7 = 5.
The difference between the fourth term (18) and the third term (12) is 18 - 12 = 6.

As the differences are not constant, the sequence 3, 7, 12, 18 is not arithmetic.