What was the approximate number of mobile cellular subscriptions per 100 people in Zimbabwe in 2003? The display gives the result of performing an exponential regression on a data set where the inputs are years since 2000 and the outputs are the corresponding mobile cellular subscriptions per 100 on Zimbabwe. ExpReg y=a*b^x a=1.067905095 b=1.501755837 r^2=.9525580427 r= .9759908005 A. 2 B. 4 C. 6 D. 8