Question 57954
Looks like they are looking for the length of the line connecting the two points: (-2,4) and (4,-4).

There is a distance formula you can memorize:
{{{d=sqrt((x[2]-x[1])^2+(y[2]-y[1])^2)}}}
{{{d=sqrt((4-(-2))^2+(-4-4)^2)}}}
{{{d=sqrt((4+2)^2+(-4-4)^2)}}}
{{{d=sqrt(6^2+(-8)^2)}}}
{{{d=sqrt(36+64)}}}
{{{d=sqrt(100)}}}
{{{d=10}}}