A Regression Analysis Between Height Y (In Cm) and Age $\hat { y }$

Multiple Choice

A regression analysis between height y (in cm) and age x (in years) of 2 to 10 years old boys yielded the least squares line $\hat { y }$ = 87 + 6.5x. This implies that by each additional year height is expected to:

A) increase by 93.5cm.
B) increase by 6.5cm.
C) increase by 87cm.
D) decrease by 6.5cm.