A straight line.
But not in curved space.
Since you asked about science, I thought I'd mention that ...
(-1, -3) (2, 4)
Distance has no concept of direction and can be measured even if a person walks 2 miles in the shape of a triangle, he or she has still walked 2 miles. Displacement, however, it the distance measured between two particular points in a certain direction.
It is defined as electromotive force, and the difference in electrical potential between 2 points in a circuit. It has also been explained as the pressure in an electrical circuit.
Wavelength is the distance between two sequential points of equal amplitude (same height) and phase of a wave. The waves we see and hear around us are of two forms. S waves are the sort of waves we would see on the surface of water. In these waves the medium (matter through which the waves travel) move back and forth orthogonally (90 degrees) to the direction of travel of the wave. In compression waves like sound waves (called P waves in seismology), the medium moves back and forth in the same direction as the wave travels. The wave length is the distance between two equivalent points in both the amount the medium is moving and the direction. In ocean waves this would be the back of one wave to the back of the next OR from the front of one wave to the front of the next OR from the top of one wave to the top of another
The square root of the sum of the squares of the differences of each coordinate. In space, the distance2=(x1-x2)2+(y1-y2)2+(z1-z2)2 On a plane, the distance2=(x1-x2)2+(y1-y2)2 On a line, the distance2=(x1-x2)2 or more simply distance=absolute value of (x1-x2)
In science there are usually infinitely many points between any two points so that there is no such thing as a consecutive point!
the distance between two points is length
11 points
Points: (-6, 1) and (-2, -2) Distance: 5 units
Points: (2, 2) and (8, -6) Distance: 10
the distance between 2 points
length
Points: (2, 4) and (5, 0) Distance: 5
If you mean points of (-4, 2) and (1, 2) then the distance works out as 5
Points: (4, 4) and (-2, -2) Distance: 6 times square root of 2
Displacement
(3-1)2 + (5-8)2 = 13 and the square root of this is the distance between the points