Algebra

Linear equations, inequalities, systems and functions — the largest scored domain on Digital SAT Math.

• Absolute value equations Absolute value is distance on the number line, not a fancy pair of bars. 12 questions · 3 worked examples · 3 figures
• Equivalent linear expressions When two linear expressions are the same for every input, their x-parts must agree and their constants must agree — separately. 12 questions · 3 worked examples
• Graphs of linear equations The picture is already the solution. 12 questions · 3 worked examples · 6 figures
• Linear equations in context When a problem describes a real situation—pay, distance, tank levels, ticket sales—you translate words into a linear equation, then either solve or interpret a coefficient. 12 questions · 3 worked examples · 1 figure
• Linear equations in one variable You already know how to solve these. 12 questions · 3 worked examples
• Linear equations in two variables One line, three costumes. 12 questions · 3 worked examples · 2 figures
• Linear functions A linear function is one rule wearing four outfits: an equation, a table, a graph, and a sentence. 12 questions · 3 worked examples · 3 figures
• Linear inequalities An inequality is an equation that lost its balance: the algebra is identical, but two extra decisions ride along — which direction the symbol points, and whether the boundary value itself counts. 12 questions · 3 worked examples · 2 figures
• Systems of linear equations Two equations, two unknowns — the algebra is rarely what costs points here. 12 questions · 3 worked examples · 1 figure
• Systems of linear inequalities A system of inequalities does not ask for a single pair (x, y). 12 questions · 3 worked examples · 3 figures