Question

John's parents recorded his height at various ages up to 66 months. They decide to use the least-squares regression line of John's height on age to predict his height at age 21 years (252 months). We conclude:

Answer 1

Answer:

Their prediction could be misleading becuase it asumes that the existing trend will continue (extrapolation).

Explanation:

If the data is the following:

Age (months) 36 48 54 60 66

Height(months) 35 38 41 43 45