An arithmetic sequence follows the formula \( a_{n}=8.4+3.2 n \). The first term is [Select ] The common difference is [Select ]

In the arithmetic sequence given by the formula \( a_{n} = 8.4 + 3.2n \), we can identify the first term and the common difference as follows: 1. **First Term (\( a_1 \))**: - To find the first term, substitute \( n = 1 \) into the formula: \[ a_1 = 8.4 + 3.2(1) = 8.4 + 3.2 = 11.6 \] 2. **Common Difference (\( d \))**: - The coefficient of \( n \) in the formula represents the common difference. Therefore: \[ d = 3.2 \] **Summary**: - **First term**: \( 11.6 \) - **Common difference**: \( 3.2 \)