Final answer:
The y component of the average acceleration in projectile motion is -9.8 m/s², representing the constant acceleration due to gravity.
Step-by-step explanation:
Focusing on the data values from part (d), the y component of the average acceleration in meters per second squared of an object experiencing projectile motion is -9.8 m/s². This is because the acceleration due to gravity, which acts downwards, is a constant value of 9.8 m/s² on the surface of the Earth.
This value is independent of the time interval as long as we neglect air resistance and assume the motion occurs near the Earth's surface where gravitational acceleration is considered constant.