It's a rocket ship, it's going to go up then down, up being positive height, so the parabola opens down.
We can see that from the coefficient on the quadratic term, here -4.9. When it's positive we get a CUP, concave up positive, i.e. opening up, vertex at the minimum. When it's negative we get a CDN, concave down negative, opening down, vertex at the max.
Answer: down