Answer:
Step-by-step explanation:
1. What is the partial effect of expendA on voteA?
ΔvoteAΔexpendA=β2+β4expendB→0.0382809+−6.63e−6expendB
2. Is the expected sign for b4 obvious?
Yes because the expendB alone is a negative and expendA is a positive leaving B4 to be a negative number .