Respuesta :

Answer:

B

Explanation:

acceleration = change in speed / change in time

for 1, speed increases over time, so positive acceleration

for 3, speed decreases over time, so negative acceleration (or deceleration)
The answer is B, because 1 is acceleration and 3 is deceleration. 2 and 4 are staying at a constant speed which means it isn’t speeding or slowing but it’s staying the same.