(x2 + x2 + x2 + x2 + x +x + x + x +x + x+ 1) + ((x2 + x2 -x -x -x -x - x - 1 -1 -1) a 6x^2 + x - 2
b 6^x2 +11x -2
c 36x^2 + x -2
d 36x^2 + 11x -2

6x^2 + x - 2

Step-by-step explanation:

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.