#### Answer

"The numerical factor of a term is called the coefficient." The answer is "coefficient."

#### Work Step by Step

The answer to problem #4 is: "The numerical factor of a term is called the coefficient." So, the answer is "coefficient."
The coefficient of a term is also referred to as the numerical factor. Both words--"coefficient" and "numerical factor"--are referring to the number in front of a variable.
Example: $4x$.
The coefficient (or the numerical factor) is 4, which is the number in front of the $x$.
You can also find the coefficient by asking "How many?"
Going back to the example, we can ask "How many $x$'s are there?" The answer is 4, because $4x$ is really just a shortened version of $x + x + x + x$.