Professor Stanton Thought That Verbal Ability Was a Function of Age.Stanton

Multiple Choice

Professor Stanton thought that verbal ability was a function of age.Stanton collected data on people aged 5 to 20.The analysis yielded the following equation: V = 20 + 3A where V = verbal ability and A = age.Stanton was asked to predict the verbal ability of a 30 year old.Stanton should respond

A) 110.
B) 90.
C) extrapolation is untrustworthy.
D) interpolation is untrustworthy.
E) 53.