In the years 1904, 1914, 1924,..., 2014, the percentage of times the starting pitcher pitched a complete game were⁷: 87.6, 55.0, 48.7, 43.4, 45.2, 34.0, 24.5, 28.0, 15.0, 8.0, 3.1, 2.4.

The linear probability model has least squares fit P(Y = 1) = 0.6930 – 0.0662x, where x = number of decades since 1904. Interpret -0.0662.