IDNLearn.com: Your go-to resource for finding precise and accurate answers. Get the information you need quickly and accurately with our reliable and thorough Q&A platform.

Three friends go shopping together and buy the same kind of rice.
Placido buys 2 pounds and pays $4.50. Sophia buys 3 lb and pays $6.75.
Roger buys 4 lb and pays $9.00.
Identify the graph and unit price that represent the cost of the rice.