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At point E, the gradient of the graph is less than zero. The curve tilting toward the time axis indicates a reduction in speed or a velocity in the negative direction, signifying deceleration.

1. At point E, the gradient of the graph is greater than zero.
2. At point E, the gradient of the graph equals zero.
3. At point E, the gradient of the graph cannot be determined.
4. At point E, the gradient of the graph is less than zero.

Correct answer: At point E, the gradient of the graph is less than zero.

Solution

The slope of a velocity-time graph represents acceleration. A negative slope indicates retardation (negative acceleration), which matches the description given in the question.

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