2.1 Manipulating and Solving Linear Equations
2.3 Connecting Rates of Change to the Slope of a Line
2.5 Graphing Standard and y = mx+ b forms
2.7 Solving Linear Systems Graphically
2.9 Substitution
2.2 Equations of Lines
2.4 The Special Lines y = b and x = a
2.6 Determining the Equation of a Line
2.8 Elimination
2.10 Solving Problems Using Systems of Equations