Final answer:
The pattern in Isaac's car mileage data has a common difference of 0.50.
Step-by-step explanation:
The correct statement that accurately describes the pattern in Isaac's car mileage data is option B) The common difference is 0.50.
A common difference refers to the arithmetic progression in the data where each value is obtained by adding a constant value to the previous value. In Isaac's car mileage data, the numbers are decreasing by a constant value of 0.50. For example, going from 6.1 to 3.8 is a move of 2.3, which is 0.50 of the total distance to get to 1.0.