-- point (1, -2)
-- point (10, 25)
You can get 3 refills.
First you subtract $4.50-$1.65 which equals $2.85. Then you find out how many times 95¢ can go into that. It goes in 3 times so you can get 3 refills.
I suspect you may have slipped up as you copied the question. Exactly as you wrote it, it has a single zero, at x= 2 .