Which statement is equivalent to newtons first law

Newtons first law states "an object at rest will stay at rest while an object in motion will remain in motion" im confused as to what you are asking for but heres an example.

a car traveling at a speed of 35mph coming up to a stop sign has to slow down to a stop it cant stop instantly thats the same for it accelerating.

The concept of linear momentum is equivalent to Newton's first law.

As per linear momentum, it is defined as the product of mass and velocity of any object.

When this law of conservation of linear momentum is applied on a single particle, this becomes equivalent to Newton's first law.