Determine whether each object is speeding up, slowing down, moving constantly, or at rest.

a. An object is moving in the negative direction with a negative acceleration.

Select an answer speeding up moving constantly slowing down

b. An object has a positive velocity with a negative acceleration.

Select an answer slowing down speeding up moving constantly

c. An object has a velocity with zero acceleration.

Select an answer moving constantly speeding up slowing down