The distance-time graph of a particle at time 𝑡 makes angle 45° with time axis. After 1s, it makes angle 60° with time axis. What is the acceleration of the particle?

Question: The distance-time graph of a particle at time 𝑡 makes angle 45° with time axis. After 1s, it makes angle 60° with time axis. What is the acceleration of the particle?