Algebra: A Combined Approach (4th Edition)

$6.403$
The distance formula is: $d = \sqrt{(y_2-y_1)^2+(x_2-x_1)^2}$. This finds the distance $d$ between two points $(x_1,y_1)$ and $(x_2,y_2)$. Distances are always positive. $d = \sqrt{(-3-2)^2+(1-(-3))^2} = \sqrt{41} = 6.403$