Rectangle a has side lengths of 6 cm and 3.5 cm. the side lengths of rectangle b are proportional to the side lengths of rectangle a. what could be the side lengths of rectangle b? a. 3cm and 1.75cm b. 5cm and 2.5cm c.7 cm and 7cm d. 12cm and 5 cm e. 5.25cm and 9cm

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.