8.A poll was conducted of more than 50,000 buyers of new cars, 90 days after the car's purchase. The data on problems per 100 vehicles for vehicles made by Toyota and General Motors are given in the time plot below for the years 1998-2004. The solid line is for General Motors, and the dashed line is for Toyota. In 2002, the number of problems per 100 vehicles was: Time Scries Plot of Problems per 100 Vehicles for GM and Toyota 190 Variable GH 180 Toy O to 170 160 150 Problems per 100 vehicles 140 130 120 110 100 1998 1999 2000 2001 2002 2003 2004 Year about twice as high for General Motors as for Toyota. about twice as high for Toyota than for General Motors. about 20% higher for Toyota than for General Motors. about 20% higher for General Motors than for Toyota