Key Idea: Coefficient
A coefficient is the numerical factor multiplied by a variable or term in an expression.
General Rule:
In a term like
ax^nthe coefficient is a, the variable is x, and the exponent is n.
Why this matters for the SAT:
Identifying coefficients is key for combining like terms, factoring, solving equations, and analyzing functions. Misreading coefficients can lead to algebra errors on the test.