I understood the last 13, but not this one. Someone please explain how to do it, or give me the answer. Please and thank you! <3 :)

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.

it would take 7/10 of an hour too fill the pool.

step-by-step explanation:

answer

step-by-step explanation: