To determine whether the sequence 7, 11, 15, 19 is arithmetic, we need to check if there is a constant difference between consecutive terms.
Let’s take a look at the differences:
- 11 – 7 = 4
- 15 – 11 = 4
- 19 – 15 = 4
Since the difference between each pair of consecutive terms is the same, specifically 4, we can conclude that this sequence is indeed arithmetic.
The common difference for this arithmetic sequence is 4.