Determine if the relationship between each pair of quantities is proportional. Explain your reasoning.



Side Length of Square (in.) 4.5 7.8 9.3 11.4
Perimeter of Square (in.) 18 31.2 37.2 45.6


Side Length of Cube (in.) 2.5 5 7 9.5
Volume of cube (in3) 15.625 125 343 857.375


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