# What is the speed of an object that travels from ( 1, -2, 3 )  to (6 , 0, 7 )  over 4 s?

Assuming a straight line motion: $v = \frac{\setminus \Delta X}{\setminus \Delta t} = \setminus \frac{\left(\setminus \sqrt{{\left(6 - 1\right)}^{2} + {\left(0 - \left(- 2\right)\right)}^{2} + {\left(7 - 3\right)}^{2}}\right) u n i t s}{4 s} = 1.677 \frac{u n i t s}{s}$.