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Giselle wants to buy the newest book in her favorite series. She has some money saved but does not want to use all her savings on the book. Giselle's grandma offers to pay some of the cost of the book for every weed she pulls in her grandma's garden. The graph shows the cost to Giselle for the purchase of the book after pulling x weeds in her grandma's garden.
1. The book is $18.
2. Giselle can earn up to $18 pulling weeds for her grandma.
3. Giselle's grandma pays her $1 for every 5 weeds she pulls.
4. Giselle does not have to use any of her own money toward the purchase of the book when she pulls 90 weeds.
5. Giselle only needs to pull 18 weeds to not use any of her own money.
