Question 1181927
The year names are not important.  Just the life expectancies.

<pre>
LIFE EXPTCTANCIES

MALE        48       75

FEMALE      51       80
</pre>

If y for males
and x for females

Points are  (51,48) and (80,75).


You now have two points as (x,y).  Use the two points to find equation and finish in slope-intercept form.