Answer
$\approx 6.32$ units
Work Step by Step
Use the distance formula $d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$ to obtain:
$d=\sqrt{(-4-2)^2+(-1-(-3))^2}
\\d=\sqrt{(-6)^2+(-1+3)^2}
\\d=\sqrt{36+2^2}
\\d=\sqrt{36+4}
\\d=\sqrt{40}
\\d \approx 6.32$