Aroller coaster car goes above and below ground.use the number line to show it changes in height.what is the height of the car at the end of the ride

Initial position of roller coaster= 1 meter above the ground=+1

Now, Position of the Roller coaster when it goes downwards by 4 meters

                                                                      =1-4

                                                                      = -3 meter

Now, it rises 13 meter above from it's final position.

So, Position of Roller coaster = -3 +13=10 meter above from ground level=+10

Now, The Roller coaster drops down by 6 meters from the last position it was,

 So, Position of Roller Coaster

   =10+(-6)

    =4 meters above the ground level  

Height of car from ground level=4 meter