18) -32.-132, -232, -332, ..
Find a

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.

9

step-by-step explanation:

c. side angle side. u shares the same sides

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed