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?



about 135 mm/HG

about 149 mm/HG

about 159 mm/HG

about 165 mm/HG