Solving Jet Plane Velocity and Acceleration using Physics Formulas

[jmd0221]

Hi, I am stuck on this problem and its probably easier than I think, can anyone help?

At an air show, a jet plane has velocity components Vx= 625 and Vy= 415 at time 3.85 and Vx= 838 and Vy= 365 at time 6.52 .
For this time interval, find the x component of the plane's average acceleration?

What formula would I use?? Thank so much been on this question of 1hr now.. :)

 

[bdforbes]

The x component of the acceleration is the amount by which the x component of the velocity has changed in this interval.

 

[Astronuc]

One is given two values for V_x at two times.

What is the relationship between average acceleration and change in speed over the change in time.

This might help.
http://hyperphysics.phy-astr.gsu.edu/hbase/acca.html

Please show the work.