Azoo park charges $10 per car plus $1 per person as an admission fee. the total charge for a car with x people is f(x) = x+10. how will the graph of this function change if the per car charge is changed to $5 per car? a)the line will shift vertically down by $5. b)the line will shift vertically up by $5. c)the line will shift vertically up by $15. d)the line will shift vertically down by $15.