PythagoreanAnswer:
They are 5 units apart.
Explanation:
This is a classical example of the pythagorean theorem (a^2+b^2=c^2). We see that point A is at the location (-3,-1) and that point B is at location (1,2) where it follows that x and y direction are shown as (x,y). The two points are 4 units away in the x-direction (found by 1-(-3)) and 3 units away in the y-direction (found by 2-(-1)). We then square both numbers, add them together, then take the square root to find the distance.
4^2(also known as 4x4)+3^2(also known as 3x3)=25
We then take the square root of 25, which is 5.