The equation yˆ=1.2676x+79.6645 models fred’s systolic blood pressure, in mm/hg , over his life span, where x is fred’s age. according to the regression equation, what is the approximate systolic blood pressure of fred at the age of 55?

The equation that models Fred`s systolic blood pressure is:
y = 1.2676 * x + 79.6645
x = 55 ( the age of 55 )
y = 1.2676 * 55 + 79.6645 =
= 69.718 + 79.6645 =
= 149.3825

The approximate systolic blood pressure of Fred at the age of 55 is 149.3825 mm/HG.