Assume this is an acceleration graph, where the x axis represents time in seconds and the y axis represent velocity in m/s.
between what time interval is acceleration the greatest?
a)
10 - 1.5 seconds
1.5 - 2.0 seconds
2.0 - 2.5 seconds
acceleration is constant throughout.

The acceleration is the greatest in the interval 10m/s to 1.5m/s

Explanation:

From the given time it is evident that as the time goes the acceleration decreases which is called deceleration. The formula used to find the high deceleration interval is

a=

Hence, the answer you would get is -16 , where negative sign stands to show that it is a decreasing acceleration.

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