Answer:
4.5 units
Step-by-step explanation:
The formula given is used to calculate the length of a segment given the coordinates of the endpoints.
let (x₁, y₁ ) = A(-1, 1) and (x₂, y₂ ) = (3,3), then
AB = [tex]\sqrt{(3+1)^2+(3-1)^2}[/tex]
= [tex]\sqrt{4^2+2^2}[/tex]
= [tex]\sqrt{16+4}[/tex] = [tex]\sqrt{20}[/tex] ≈ 4.5 ( nearest tenth )
