The graph at left in the tc-plane models the global wind power capacity, c, in gigawatts, t years since 1996. What is the best interpretation of the c-intercept of this graph?
The image shows an exponential curve graphed in the first quadrant of the 't c'-plane. The horizontal 't'-axis is labeled Years since 1996 and the vertical 'c'-axis is labeled Global wind power capacity (gigawatts). The graph crosses the 'c'-axis at about 7 and increases exponentially, passing roughly through the point (13 comma 150).