The distance it takes a car to come to a complete stop after the brakes are applied is related to the speed that the car is traveling. the stopping distances and speeds are shown in the table.
d s
20 17.89
40 25.30
60 30.98
80 35.78
100 40.00
We will check each option for table.
For d=20, Put d=20 into
For d=40, Put d=40 into
For d=60, Put d=60 into
For d=80, Put d=80 into
For d=100, Put d=100 into
All the value of table satisfy the first equation.
The formula for slope is referred to "rise over run". So in this case you rise 2 over one (2/1) That gives you 2. But since the line is going down is -2