Question

if A= (-1, -3) and B= (11, -8) what is the length of AB A) 14 units B) 11 units C) 13 units D) 12 units

Answer 1

Distance is the formula : 

D$AB$ = $\sqrt{(xA - xB)^2 + (yA - yB)^2}$
 
so 

$\sqrt{(-1 - 11)^2 + (-3 + 8)^2}$

= 13 

Answer is C)