At a concession stand, seven hot dog(s) and four hamburger(s) cost $14.00; four hot dog(s) and seven hamburgers(s) cost $16.25. find the cost of one hot dog and the cost of one hamburger.

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.