[tex]\text {Distance = } \sqrt{(Y_2 - Y_1)^2 + (X_2-X_1)^2} [/tex]
[tex]\text {Distance = } \sqrt{(-1-3)^2 + (10+6)^2} [/tex]
[tex]\text {Distance = } \sqrt{(-4)^2 + (16)^2} [/tex]
[tex]\text {Distance = } \sqrt{16 + 256} [/tex]
[tex]\text {Distance = } \sqrt{272} [/tex]
[tex]\text {Distance = } 16.5 \ units[/tex]
