a. The slope here is 100. The slope can be thought of as the increase in y over the increase in x; in this problem, for every unit that is manufactured (x), the cost goes up by 100 (y). 100/1 is 100. It represents the increase in cost per unit manufactured.
b. The y-intercept is 1500. This represents the initial investment into the wristbands; the company must spend a fixed cost of 1500 to make wristbands.
