Given: y = -x - 6 –––– 2 write the equation in general form ax + by + c =0. -x - 2y - 6 = 0 -x + 2y - 6 = 0 x + 2y + 6 = 0

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.

the answer is two. hope this !