Question on 3D vectors: The position vectors (4,7,k) (10,-2,6) and (2,10,-2) are colinear. Find the value of k.

[jessiemyapg]

The position vectors (4,7,k) (10,-2,6) and (2,10,-2) are colinear.
Find the value of k.

 

[tkhunny]

Hint: What vector gets you from (10,-2,6) to (2,10,-2)?