Vol. 26, No. 2/3, Learning Mathematics: Constructivist and Interactionist Theories of Mathematical Development (Mar., 1994), pp. 135-164 (30 pages) Conventional treatments of functions start by ...

Figure 1: Rates of temperature change over 40-year periods for a number of climate reconstructions that cover various Northern Hemisphere areas. Figure 2: 40-year rates of change from the PAGES 2k ...