A *coefficient* is a numerical or constant factor that is multiplied by a variable or term in a mathematical expression. In simpler terms, it’s the number in front of a variable that tells you how many times the variable is being multiplied.

**In Algebra**:- In the expression $3x$ , the number
**3**is the coefficient of the variable $x$ . It means*3 times $x$*. - In a more complex expression like $5x^2 + 7x + 4$ , the coefficients are:
**5**for $x^2$ ,**7**for $x$ ,- And
**4**is a constant term (not a coefficient since it’s not multiplied by any variable).

- In the expression $3x$ , the number
**In Systems of Equations**:- In a system like: $2x + 3y = 10$ Here,
**2**is the coefficient of $x$ , and**3**is the coefficient of $y$ .

- In a system like: $2x + 3y = 10$ Here,
**In Polynomials**:- In a polynomial like $a_nx^n + a_{n-1}x^{n-1} + ... + a_1x + a_0$ , each $a$ term is a coefficient associated with a particular power of $x$ .

Coefficients help define the shape and behavior of mathematical functions, especially in algebra, calculus, and applied mathematics. They scale or *weight* the variable, impacting the value of the term it multiplies. In physics, coefficients can represent quantities like friction, elasticity, and many other measurable constants in formulas. In statistics, coefficients in regression models represent the relationship between variables.