The weight of the wolf can be found by plugging the length of 1.2m into the regression equation: Y=-16.46 +35.02(1.2) = 35.02*1.2 -16.46 = 42.02 - 16.46 = 25.56 kg.
However, the residual is given as +5.67 kg. This means that the actual weight of the wolf was 5.67 kg more than the weight predicted by the regression equation. Therefore, the weight of the wolf is 25.56 kg + 5.67 kg = 31.23 kg.