Try this simple test of the above argument. Draw a series of W lines of different slopes all crossing the J line at the same point. Now draw a second
Try this simple test of the above argument. Draw a series of W lines of different slopes all crossing the J line at the same point. Now draw a second J line above the first. Mark the original equilibrium and all the new ones corresponding to each of the W lines. It should be quite obvious that the flatter the W line the more will Y have increased.