Calculating the Cost Function
This page focuses on determining the coefficients of the cost function K(x) = ax³ + bx² + cx + d using given data points.
The process involves:
- Setting up a system of equations using the given data points.
- Solving the system of equations to find the values of a, b, and c.
- Using the known fixed cost (d = 24) to complete the function.
Example: Using data points (4, 68), (6, 122), and (7, 166), we create a system of equations: 64a + 16b + 4c = 44 216a + 36b + 6c = 98 343a + 49b + 7c = 142
Through algebraic manipulation and substitution, the coefficients are determined:
a = 1 b = -10 c = 35 d = 24 (given)
Highlight: The final cost function is derived as K(x) = x³ - 10x² + 35x + 24
This method demonstrates how to construct a cost function from empirical data, a crucial skill in business economics and financial modeling.