If your speed changes from 10 km/h to 6 km/h, you have a(n) acceleration.. a.. negative. c.. neutral. b.. positive. d.. oscillating.

So if your speed changes from 10 km/h to 6 km/h, this means that you are des accelerating, so your velocity is decreasing. This will happen only if your acceleration is negative.

If your acceleration is positive, your velocity will increase, if your acceleration is neutral, then your velocity will be constant. If your acceleration is oscillating, then your velocity will decrease, then increase, then decrease, and so on.

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