#5 = car cuz at first it was stationary(was at the garage) then the owner left to buy some snacks so he took the car and accelerated(the graph was steep) after some time he was going at constant speed. When he found MacDonalds he decelerated and parked his car
#8
a)it shows the no. of people joining the school
b)No. it wouldnt make sense to connect the dots cuz one pont isn't related to the other. For instance today a the joker killed 15 people and the next day he kills 16 people. You cannot say that he kills 15.5 people daily.