Key takeaway: Algebra 1 vocabulary gathers 49 ninth-grade terms such as function notation, point-slope form, geometric sequence, factoring, vertex form, quadratic formula and residual.
Algebra 1 is where functions take center stage. Linear, exponential and quadratic models each bring their own words: intercepts, rates of change, growth factors, vertices, discriminants. This Algebra 1 vocabulary page, written for Grade 9, lists them all with the precise meaning a teacher expects on a test.
The terms follow Appendix A of the Common Core, from equations and inequalities to statistics with two variables. Each page shows the notation, a graph or diagram, and one problem solved from start to finish.
49 terms on this page, each with a definition, a figure and a worked example.
Algebra 1 Vocabulary: the full list
Numbers and Operations
- Rational Exponents N-RN.A.1
- Simplifying Radicals N-RN.A.2
Expressions and Equations
- Binomial A-APR.A.1
- Completing the Square A-REI.B.4a
- Compound Inequality A-REI.B.3
- Degree of a Polynomial A-APR.A.1
- Difference of Squares A-SSE.A.2
- Discriminant A-REI.B.4b
- Factoring A-SSE.A.2
- Factoring Out the GCF A-SSE.A.2
- FOIL Method A-APR.A.1
- Literal Equation A-CED.A.4
- Monomial A-SSE.A.1a
- Perfect Square Trinomial A-SSE.A.2
- Polynomial A-APR.A.1
- Quadratic Formula A-REI.B.4b
- System of Inequalities A-REI.D.12
- Trinomial A-APR.A.1
- Zero Product Property A-SSE.B.3a
Functions and Graphs
- Absolute Value Function F-IF.C.7b
- Arithmetic Sequence F-IF.A.3
- Average Rate of Change F-IF.B.6
- Axis of Symmetry F-IF.C.7a
- Compound Interest F-IF.C.8b
- Domain and Range F-IF.A.1
- Explicit Formula F-BF.A.2
- Exponential Decay F-LE.A.1c
- Exponential Function F-LE.A.1
- Exponential Growth F-LE.A.1c
- Function Notation F-IF.A.2
- Geometric Sequence F-IF.A.3
- Inverse Function F-BF.B.4a
- Parabola F-IF.C.7a
- Piecewise Function F-IF.C.7b
- Point-Slope Form A-CED.A.2
- Quadratic Function F-IF.C.7a
- Recursive Formula F-BF.A.2
- Standard Form of a Linear Equation A-CED.A.2
- Standard Form of a Quadratic F-IF.C.8a
- Vertex Form A-SSE.B.3b
- Vertex of a Parabola F-IF.C.8a
- Vertical Line Test F-IF.A.1
- X-Intercept F-IF.B.4
- Zeros of a Function A-APR.B.3
Statistics and Data
- Correlation Coefficient S-ID.C.8
- Correlation vs. Causation S-ID.C.9
- Linear Regression S-ID.B.6a
- Residual S-ID.B.6b
- Standard Deviation S-ID.A.2