The cost y, in dollars, to produce graphing calculators is given by the equation y = 45x + 4500, where x is the number of calculators produced. What is the cost to produce 2200 calculators? And: Cost is y. Number of calculators is x. Here, x is given to be 2200 So in the equation, y = 45*x + 4500, substitute x as 2200 and do the math to get the value of y, which will be the cost. Hope you got it :)