How Shape Helps Function Practice Test

Yuki answered a question about a step stool in the reading corner. The stool has a flat top to stand on and a wide base at the bottom. Yuki said, “The flat top gives a hard place to stand, so I can reach the high bookshelf. The wide base makes it steady, so it doesn’t wobble.” The teacher saw her reach safely. How does Yuki connect the shape to solving the problem?

In the classroom, Jamal carried books on a tray, but they slid off. He built a tray with raised edges all around and a wide base. Jamal said, “The raised edges are like little walls that stop the books from sliding off, so I can carry them safely. The wide base makes it steady, so it doesn’t tip.” His friend tried it and the books stayed on. How does Jamal explain how the shape helps?