Question 1040374
y = 0.2052x – 336.5
=(0.2052)(1970)-336.5=67.7 years
y=(0.2052)(2020)-336.5=78.0 years
slope of the line is 0.2052, and the units are rise/run which is age(in years)/year of birth
The real-world application is that age of male children born increases 0.336.5, a third of a year, for every year their birth is delayed.  Or, male children born 10 years later will be expected to live about 3.4 years longer than their counterparts.
r=sqrt(0.9809)=0.99.  This is a very high correlation and I would say the strength of the linear relationship is very strong.