120 100 80 60 40 20 0 Current weight pounds 220 180 Parrot tarsus length does not seem to be useful for predicting parrot weight given the form of the scatterplot 140 100 6 Current weight versus birth weight 12 year old boys r 0 19 60 0 Parrot weight versus tarsus length r 0 84 8 O 10 12 Tarsus mm 50 14 16 18 100 Birth weight oz 150 O 200 Birth weight does not appear to give useful information for predicting current weight for 12 year old boys according to the plot Answer Bank Stigma height mm 16 14 12 10 L Life expectancy years 80 60 40 O 0 Flower stigma height versus anther height r 0 79 0 12 Anther height mm For each percentage increase in anther height it is very likely that the stigma height increases by a proportional percentage O 10 20 8 80 Life expectancy versus age U S males r 0 99 40 O 60 Age years 14 OOOOOOOOOOOOOOOOOOOO 80 O 100 16 For each percentage increase in age it is very likely that the life expectancy increases by a proportional percentage 120