Determine if each relationship is a proportional or nonproportional situation. Explain your reasoning. (Assume that the tables represent
linear relationships.)

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

2x minus y equals 6, x plus y equals negative 3

One file clerk can file 10 folders per minute. a second file clerk can file 11 folders per minute. how many minutes would the two clerks together take to file 672 folders?