Question 173824
Use the distance formula,
{{{D=sqrt((x[1]-x[2])^2+(y[1]-y[2])^2)}}}
{{{D=sqrt((1-(-4))^2+(-5-1)^2)}}}
{{{D=sqrt((5)^2+(-6)^2)}}}
{{{D=sqrt(25+36)}}}
{{{D=sqrt(61)}}}
of approximately,
{{{D=7.81}}}
{{{drawing( 300, 300, -6, 6, -6, 6,grid( 1 ),circle( 1, -5, .2 ),circle(-4,1,0.2),green(line( 1, -5, -4, 1)))}}}