Question

The distance between the points (-1, 5) and (2, 1) is ___ units.

Answer 1

Apply distance formula between the points (-1, 5) and (2, 1),
d = $\sqrt{{(2-(-1\left)\right)}^2+{(1-5)}^2}$
= $\sqrt{{(2+1)}^2+{(-4)}^2}$
= $\sqrt{9+16}$ = $\sqrt{25}$
= 5 units