Page 2 Math 227 Lab 18: Section 13.4 Name: ex == ' T for the cost in millions 3. Graph the cost function for making electric cars that is modeled by C(x) = of dollars and x the number of electric cars produced per week in hundreds. Before graphing, be sure to find the points where the relative extrema and inflection points occur. Also, write a sentence on where relative extrema and inflection points occur.