Question

Find the lenght of the straight line between (-1,-3) and (2,6)

Answer 1

Answer:

c

Step-by-step explanation:

Answer 2

Answer:

3$\sqrt{10}$

Step-by-step explanation:

Calculate the distance d using the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = (- 1, - 3) and (x₂, y₂ ) = (2, 6)

d = $\sqrt{(2+1)^2+(6+3)^2}$

  = $\sqrt{3^2+9^2}$

  = $\sqrt{9+81}$

  = $\sqrt{90}$

  = 3$\sqrt{10}$ ← exact value

≈ 9.5 ( to 1 dec. place )