Final answer:
The number 2 in the expression 2x + 3 is called the coefficient.
Step-by-step explanation:
The correct answer is A) coefficient.
In the expression 2x + 3, the number 2 is called the coefficient. A coefficient is a number that is multiplied by a variable in an algebraic expression or equation. In this case, the coefficient 2 is being multiplied by the variable x.