Thirty-Six

Unit 3 · 4 skills

Linear Relationships

Equations, slope, lines, inequalities, and systems, the backbone of ACT algebra.

  • 5 lessons
  • 145 min of lessons so far
  • Unit boss

Your progress

 
Lesson 3.1

Skills covered

  • A2 · StructuresLinear Equations & Literal FormulasBalanced Mass Frame
  • F2 · GuidanceLinear Functions & SlopeAscent Profile
  • A3 · StructuresInequalities & Absolute ValuePressure Tolerances
  • A4 · StructuresSystems of EquationsDual Propellant Feed

Lessons

  1. 3.1Linear Equations & Literal FormulasSolve linear equations cleanly and rearrange formulas for any variable.29 min 
  2. 3.2Slope from Points, Graphs & TablesRead rate of change in every representation and keep rise over run in order.29 min 
  3. 3.3Equations of Lines & Linear ModelsBuild line equations, interpret their parameters, and recognize parallel and perpendicular lines.29 min 
  4. 3.4Inequalities & Absolute ValueSolve ranges and distance statements, including the sign flip and two-case traps.29 min 
  5. 3.5Systems of EquationsSolve two constraints together and recognize one, zero, or infinitely many solutions.29 min 

Challenge sets

Optional, hardest-level questions at the end of each lesson. This is where a 36 is won.

Unit bossSeal Linear RelationshipsA mixed set across every skill in this unit. Pass it to earn the unit seal.