Final answer:
The coefficient of the first term in the expression – 9n is -9, which includes the negative sign indicating the direction of the term.
Step-by-step explanation:
The coefficient of the first term in the given expression – 9n is -9. A coefficient is a number that multiplies a variable, and in this case, the number multiplying n is -9. It is important to include the sign of the number when identifying coefficients, as it indicates the term's direction (positive or negative).