Algebra The heart of the SAT Math section: linear equations and functions read every way the test asks — solve, interpret, build from context — plus systems and inequalities. Master the line and a third of the paper is yours.
The course — 6 units, in order
01 Solving Linear Equations From one-step equations to variables on both sides, fractions, special cases, and rearranging formulas — the balance-scale logic that runs all of algebra. Start 02 Linear Functions & Slope Slope as a rate, the y = mx + b form, point-slope and standard forms, and parallel & perpendicular lines — straight lines as the algebra of steady change. Start 03 Systems of Equations Two conditions, two unknowns: solving systems by graphing, substitution, and elimination, choosing the right tool, and reading no-solution and infinite cases. Start 04 Linear Inequalities Solving and graphing inequalities, the negative-flip rule, compound 'and/or' conditions, and absolute-value equations — algebra for ranges instead of single answers. Start 05 Linear Models & Variation Writing linear models from context, direct variation revisited, and inverse variation — y = k/x, the other proportionality. Start 06 Systems of Inequalities Graphing two-variable inequalities, shading half-planes, and systems of inequalities as feasible regions. Start 