A regression was run to determine if there is a relationship between hours of study per week (xx) and the final exam scores (yy). The results of the regression were:

y=ax+b a=5.31 b=22.67 r²=0.459684 r=0.678

Use this to predict the final exam score of a student who studies 0.5 hours per week, and please round your answer to a whole number.