Models of Quadratic Function.

• Quadratic function


  A function that can be written in the form y = ax^2 + bx + c, where a, b, and c are real numbers
• The graph of a quadratic function is a parabola
• If a > 0, the parabola opens upward
• If a < 0, the parabola opens downward
• Identifying if a function is quadratic


  1. Check if the function can be written in the form y = ax^2 + bx + c

  2. Check if the highest degree of the variable is 2
• Linear function


  A function that can be written in the form y = mx + b, where m and b are real numbers
• When a firm increases advertising

  The demand curve shifts right, increasing the equilibrium price and quantity
• Total utility is the sum of marginal utilities
• Quadratic functions have the highest degree of 2