Frame S' passes frame S in the usual way (positive directions). An object also moves in the positive direction. Which is true? The object's speed relative to S is greater than its speed relative to S'. The object's speed relative to S can be greater than or less than its speed relative to S', depending on the actual values. The object's speed relative to S is equal to its speed relative to S'. The object's speed relative to S is less than its speed relative to S'.

The answer is "The object's speed relative to S can be greater than or less than its speed relative to S', depending on the actual values."

Explanation:

The S' frame and the object are moving in a positive direction. The object is moving with respect to the S frame so the S frame the rest frame

take the velocity of the object with respect to the rest frame as v and the velocity of the S' frame with respect S frame as v2

relative velocity of the object to the S' frame would be

Vrel = v2 - v

This means the Vrel of the object with respect to the S' frame is less than the Vrel of the object with respect to the S frame

However is the S' velocity is greater than that of the object then the Vrel of the object with respect to the S' frame is greater than the Vrel of the object with respect to the S frame.

This would mean the second option is the answer, the relative speed of the object depends on the actual values.