now we can use this cool line that uses regression to find the proper fraction
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Ekspresi 6: "v" round left parenthesis, "a" , right parenthesis tilde round left parenthesis, "v" round left parenthesis, "a" , right parenthesis , right parenthesis left brace, "a" greater than or equal to 1 , right bracevrounda~roundvroundaa≥1
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Ekspresi 7: "u" Subscript, "p" "p" "e" "r" , Baseline equals "f" left parenthesis, 2 , right parenthesis round left parenthesis, "a" , right parenthesisupper=f2rounda
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Ekspresi 8: "l" Subscript, "o" "w" "e" "r" , Baseline equals round left parenthesis, "a" , right parenthesislower=rounda
