The term "coefficient" typically refers to a numerical factor in a mathematical expression or equation, particularly in algebra. For example, in the expression (9x), the number 9 is the coefficient of the variable (x). Therefore, if you are asking if 9 can be a coefficient, the answer is yes, it can be a coefficient in various mathematical contexts.
If the question is, "What is the coefficient of 9b2 ?".......then the answer is 9.
It is 9
The 2008 Mazda CX-9 has a drag coefficient of .36 Cd.
The 2010 Mazda CX-9 has a drag coefficient of 0.36 Cd.
The 2014 Mazda CX-9 has a drag coefficient of 0.35 Cd.
The 2009 Mazda CX-9 has a drag coefficient of .36 Cd.
The 2013 Mazda CX-9 has a drag coefficient of 0.35 Cd.
The 2007 Mazda CX-9 has a drag coefficient of 0.40 Cd.
The 2011 Mazda CX-9 has a drag coefficient of 0.36 Cd.
The 2012 Mazda CX-9 has a drag coefficient of 0.35 Cd.
9
-9