A student puts two equal-sized samples of crushed apple into two beakers, P and Q. She pours $5\text{ cm}^3$ of pectinase solution into beaker P and $5\text{ cm}^3$ of water into beaker Q. After five minutes, she transfers the crushed apple samples into two separate filter funnels, then measures the amount of juice that filters through from each sample during a 10 minute period. Which graph represents her results?