(3-1)2 + (5-8)2 = 13 and the square root of this is the distance between the points
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The distance between the points of (4, 3) and (0, 3) is 4 units
Points: (-4, 5) and (3, 16) Distance: square root of 170 which is about 13
The distance between (3, 7) and (-3, -1) is sqrt{[(3 - (-3)]2 + [7 - (-1)]2} = sqrt{[3 + 3]2 + [7 + 1]2} =sqrt{[6]2 + [8]2} = sqrt{36 + 64} = sqrt{100} = 10 units.
If you mean endpoints (-1, -3) and (11, -8) then by using the distance formula the length between the points is 13 units
Points: (-1, 2) and (4, 3) Slope: 1/5