This answer is not too bad but there is a better answer. You want to maximize the number of sp2 carbon-sp3 carbon bonds which are stronger than sp3 carbon-sp3 carbon bonds. The alkene will also be stabilized by hyperconjugation resonance and you should also try to maximize this interaction. You were also incorrect in that, if the double bond formed in this direction, the trans isomer would be formed not the cis.