The weather forecaster says that the probability of rain on Saturday is 20% and the probability of rain on Sunday is 30% (a) Can you determine the probability of rain over the weekend (Saturday or Sunday)? Explain.
(b) If it rains on Saturday, the probability of rain on Sunday is 60%. Can you now determine the probability of rain over the weekend?

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.