Algebra I Mastery Hub
Grade 9 turns middle-school patterns into a full first course in algebra: linear equations, systems, exponents, polynomials, quadratics, and statistics.
Grade 9 · Algebra I
Curriculum Chapters
Real Numbers & Algebraic Reasoning
Classify real numbers, justify each step with a named property, reason with units, and write and evaluate expressions.
Linear Equations & Inequalities
Solve multi-step and literal equations, compound and absolute-value inequalities, and graph solutions in two variables.
Linear Functions & Modeling
Find domain and range, write a line in three forms, build parallel and perpendicular lines, and model with piecewise functions.
Systems of Equations & Inequalities
Solve systems by substitution and elimination, handle three unknowns, graph feasible regions, and optimize an objective.
Exponents & Exponential Functions
Use rational exponents and radicals, apply the laws of exponents, model growth and decay, and compare linear vs. exponential.
Sequences & Patterns
Identify arithmetic and geometric sequences, write recursive and explicit formulas, and model linear vs. exponential patterns.
Polynomials & Factoring
Classify, add, subtract, and multiply polynomials, use special products, and factor GCFs, trinomials, and differences of squares.
Quadratic Functions
Graph parabolas, find the vertex, axis, and intercepts, convert between standard, vertex, and factored form, and describe transformations.
Solving Quadratic Equations
Solve quadratics by factoring, square roots, completing the square, and the quadratic formula, and read the discriminant.
Radical Equations
Solve equations with variables inside square roots, isolate the radical, square both sides, and detect extraneous solutions.
Algebraic Fractions & Equations
Simplify fractions by factoring out GCFs and quadratics, multiply and divide terms, and solve rational equations.
Descriptive Statistics
Build box plots and histograms, compute standard deviation, fit a regression line, and read two-way tables for association.
About this page
About Grade 9 Mathematics
Grade 9 Mathematics on Scholi is organised chapter by chapter. Each chapter opens as an interactive lesson with a visualizer, a cheat sheet of the rules and worked examples, and a practice set arranged in easy, medium and hard tiers.