For two given points, (x1,y1) and (x2, y2) the distance between the points can be calculated by,
Distance formula,
d=√((x2 - x1)²+(y2 - y1)²
Given points,
(x1, y1) = (-3, -6)
(x2, y2) = (-3, 1)
Put the values,
d = √(-3 + 3)² + (-6 - 1)²
d = √ 0 + (-7)²
d = √49
d =
7
But distance is always positive. Hence, the distance between the pair of points. (-3, -6) and (-3, 1) is 7 units.