Why is each output quantity represented by a line and not just by a point? In the long run, there are often a number of different ways to get a particular quantity of output. If one were making sweaters, for example, one could choose to either hire a bunch of knitting grandmas or rent some mechanized knitting looms. Both approaches would make sweaters perfectly fine, but the first approach entails a lot of labor and not much capital (. is labor intensive), while the second requires a lot of capital but not much labor (. is capital intensive). On the graph, the labor heavy processes are represented by the points toward the bottom right of the curves, and the capital heavy processes are represented by the points toward the upper left of the curves.