What inference can you make by comparing the measures of variability​

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

What is the average rate of change for this function for the interval from x=2 to x=4 ?

How many solutions does the nonlinear system of equations graphed below have?