Unemployment rate 6 5 4 01/98 01/00 01/02 01/04 01/06 01/08 Year (Ref 1A-16 Figure: Seasonally Adjusted Unemployment Rate) Use Figure: Seasonally Adjusted Unemployment Rate. The distance between each labeled point on the horizontal axis is one year, and the distance between each labeled point on the vertical axis is one percentage point of unemployment. What is the approximate slope of the graph between 1/2004 and 1/2006 (using percentage point and years as the units on the vertical and horizontal axes, respectively)? O a. -1/2 Ob. 1 O c. 1/2 O d. -2