Using the Pythagorean Theorem, we can find the length between the two points:
Length = sqrt((Difference in x-coordinates)^2 + (Difference in y-coordinates)^2)
Length = sqrt((2 - (-2))^2 + (4 - (-1))^2)
Length = sqrt((4)^2 + (5)^2)
Length = sqrt(16 + 25)
Length = sqrt(41)
Therefore, the length between the two points is approximately 6.40.