Linear Expressions & Equations
Writing, simplifying, and evaluating algebraic expressions, and solving single-variable linear equations — excludes systems (see systems-of-equations), inequalities (see inequalities), and polynomial/radical expressions (see polynomials-quadratics, radical-rational-expressions)
Linear Graphing & Slope
Slope, y-intercept, graphing linear equations, identifying graph properties, and slope-intercept form
Patterns & Sequences
Arithmetic and geometric sequences, pattern recognition, and nth-term formulas — classified under algebra because the core skill is generalizing a rule, even though SSAT places it under Number Concepts
Inequalities
Solving and graphing linear inequalities and compound inequalities — uses < > ≤ ≥ instead of =
Systems of Equations
Solving for two or more unknowns simultaneously using substitution, elimination, or graphing
Functions
Function notation f(x), evaluating functions, input/output tables, domain, and range — does NOT include graphing