Which of the following is cheaper per item: $6$6 pencil cases for $\$24$$24 at Shop ZYX or $9$9 pencil cases for $\$54$$54 at Shop PWR?
What is the cost of a single pencil case at Shop ZYX?
What is the cost of a single pencil case at Shop PWR?
Hence which is the best place to buy pencil cases, if you want the best price per item?
Solve problems involving ratios, rates, and directly proportional relationships in various contexts (e.g., currency conversions, scale drawings, measurement), using a variety of methods (e.g., using algebraic 15 20 x 4 reasoning, equivalent ratios, a constant of proportionality; using dynamic geometry software to construct and measure scale drawings)