The simplest cost function is the linear cost function C(x)=mx+b, where the y-intercept b represents the fixed cost of operating a business and the slope m represents the variable costs. Suppose that a small bicycle manufacturer has daily fixed costs of $1900 and each bicycle costs $40 to manufacture.a. Write a linear function that expresses the cost of manu. x bicycles in a day.C(x)=b. Graph the linear function.