Answer:
only{(0,0), (3,0), (5,0)} (the x axis)
Step-by-step explanation:
as all the others have more than one possible output y for a unique input x
x = 0
y = -4
negative 4 cuz the line goes down, meaning it's negative
4,7, and 6
8 divided by 2 is 4
14 divided by 2 is 7
3 times 2 is 6
21 flowers
because if dora can plant 18 plants then Charlie can plant 21 flowers