In themselves, the previous pings tell us virtually nothing.
Most likely yes but not necessarily.
There are at least two possibilities that would tell us something:
1) The difference in distance to the aircraft between consecutive pings is close to the max distance the aircraft could have flown in the time between pings. This would mean the aircraft was flying either directly away or directly towards the satellite.
2) All or several pings measured the same distance to the aircraft. This would mean the aircraft was either stationary or flying exactly along the equi-distant radius to the satellite.