The coordinates of the endpoints of AB are A(−4, 3) and B(1, −3). Which measurement is closest to the length of AB in units?

To find the length of line AB, we can use the distance formula:

Distance = √((x2 - x1)^2 + (y2 - y1)^2)

Plugging in the coordinates of A and B:

Distance = √((1 - (-4))^2 + (-3 - 3)^2)
Distance = √(5^2 + (-6)^2)
Distance = √(25 + 36)
Distance = √61

Approximately, the length of line AB is 7.81 units. So the closest measurement to the length of AB in units is 8 units.