Master SAT Algebra.
High speed, zero errors.
Algebra forms the backbone of the Digital SAT Math section. Master linear equations, systems, inequalities, and learn how to solve 70%+ of these questions in under 30 seconds using the built-in Desmos graphing calculator.
Core Algebra Subtopics
Click any topic to explore formulas, high-frequency question patterns, and Desmos shortcuts.
Linear Equations (1 Variable)
Solving for constants, matching matching forms, and identifying 1 solution, no solution ($0=k$), or infinitely many solutions ($0=0$).
ax + b = cx + dSystems of Linear Equations
Intersections of two lines, substitution vs elimination, and finding constant $k$ for no intersection or infinite solutions.
a₁x + b₁y = c₁Linear Functions & Word Problems
Interpreting slope as rate of change and y-intercept as initial value in real-world science and finance scenarios.
y = mx + b · f(x)Linear Inequalities in 1 & 2 Variables
Boundary lines, shaded feasible regions, maximum/minimum constraints, and coordinate test points.
y ≤ mx + bLinear Equations (2 Variables)
Finding slopes from $(x, y)$ coordinate pairs, determining constant rate of increase, and checking table fit in Desmos.
m = (y₂ - y₁) / (x₂ - x₁)Algebra Word Problems
Translating contextual problems into algebraic models, finding unknowns, and verifying solution feasibility.
Total = Rate · x + BaseSolve 2-Variable Systems Instantly Without Algebra
Instead of multiplying equations by coefficients and doing manual elimination, type both equations directly into Desmos. Tap the gray intersection point to read $(x, y)$ in 3 seconds.
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