Question

If A =(-1,-3) and B = (11,-8), what is the length of AB?

Answer 1

Answer:

C

Step-by-step explanation:

Calculate AB using the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = A(- 1, - 3) and (x₂, y₂ ) = B(11, - 8), thus

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

     = $\sqrt{12^2+(-5)^2}$

     = $\sqrt{144+25}$ = $\sqrt{169}$ = 13 → C