# Find column form value

A is the point (98, -17) and B is the point (-39, 39). The vector $\vec {BA}$ has column form given by $\left( \begin {array}{c} h \\ k \end {array}\right)$

What is the value of h?

Cant figure how to resolve this.. do i need to add point A and B after converting them to component form?

-

It looks like you already have them in components. The vector is from $B$ to $A$, so you need to subtract the components, which is subtracting $\vec {OA}- \vec {OB}$.
A nasty person made up the problem. Note that to find $XY$ we calculate $OY-OX$. So to calculate $BA$ we calculate $OA-OB$. –  André Nicolas Sep 11 '12 at 15:24
@JackyBoi: Yes, it is correct, $98-(-39)$. –  André Nicolas Sep 11 '12 at 15:27