Caitlin travels 4.5 miles at 11/3 hours.
So his rate of travel will be
[tex]\frac{4.5}{\frac{11}{3}}=1.23[/tex]His rate is 1.23 mile/hour
Again Martin travels 4.25 miles at 11/5 hours
So his rate will be
[tex]\frac{4.25}{\frac{11}{5}}=1.93[/tex]Hence martins rate is 1.93 miles/hour.
SO Martin travels at a greater rate than Caitlin.