Math Graphs and linear progressions

Days on x-axis

1=0
2=21
3=49
4=82
5=117
6=146
7=182
8=187
9=194
10=202
11=206
12=213
13=217
14=220
15=223

McCain Table Linear Progression: y=.0021X+47.4791
Obama Table Linear Progression: y=.0284X+42.4526

McCain Prediction: 48.016%
Obama Prediction: 49.6155%

Unfortunately according to this prediction, Obama will win North Carolina