Distance between points (-1, -3) and (1, 3)

Given Coordinates: x₁ = -1  y₁ = -3,  x₂ = 1  y₂ = 3
Distance Formula: d = √(x₂ − x₁)² + (y₂ − y₁)²
Substitute the given coordinates into the Distance Formula and Simplify:
d = √(1 − (-1))² + (3 − (-3))²
d = √(1 + 1)² + (3 + 3)²
d = √2² + 6²
d = √4 + 36
d = √40
d = √4 * 10
d = √4 * √10
d = 2√10
Therefore, the distance between the points (-1, -3) and (1, 3) is equal to 2√10
Note: As a decimal number, 2√10 ≈ 6.3245553203368