Question 1057618
1971 42.4
1980 37.1
Use the data to find the slope of the equation,
{{{m=(42.4-37.1)/(1971-1980)=-5.3/9=-53/90}}}
Use the point slope form of a line with either point,
{{{y-42.4=-(53/90)(x-1971)}}}
{{{y-42.4=-(53/90)x+104463/90}}}
{{{y=-(53/90)x+104463/90+3816/90}}}
{{{y=-(53/90)x+108279/90}}}