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• The general form of a linear equation is ax + by = c, where a and b are non-zero coefficients.
• Solving a linear equation involves using inverse operations to isolate the variable.
• Linear equations can have one solution, no solution, or infinitely many solutions.
• If the graphs intersect at one point, it represents the solution to the system.
• To solve an equation with two variables, we can use substitution or elimination methods.
• Substitution method: Replace one variable with its equivalent expression from another equation.
• Elimination method: Add/subtract equations to eliminate one variable.
• The axis of symmetry passes through the x-coordinate of the vertex (h).
• Linear Equation Formula

  y = mx + c
• Quadratic Equation Formula


  ax^2 + bx + c = 0
• y = mx + c


  y = slope times x plus y-intercept
• Distance Formula

  distance between (x1, y1) and (x2, y2)