Question

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

A. 11 units

B. 14 units

C. 13 units

D. 12 units

Answer 1

C

Explanation:

Answer 2

C

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 =
`√((11+1)^2+(-8+3)^2)`

=
`√(12^2+(-5)^2)`

=
`√(144+25)` =
`√(169)` = 13 → C