It's called "free wheel". Free wheeling will allow the car to pick up speed which could get you in trouble and lose control. Also known as a "Geogia overdrive" illegal in most if not all states.
Parking on a slope should not have any effect on starting a 1990's automobile.
a downward slope.
due to negative slope
Downward
supplycurve is negative slope in decreasing cost industry
It has a negative (downward) slope.
An anhedral is the downward slope of an aircraft's wing.
A backslope is a downward slope, such as away from the bank of a river.
slope
the answer is continetal slope
Anhedral refers to the downward slope of an aircrafts wings.
indifference curves slopes downward to the right