Answer:
therefore carlos walks much faster.
Explanation:
unit rate for carlos:
[tex]\sf \frac{y-y1}{x-x1}[/tex]
[tex]\sf \frac{8-4}{2-1}[/tex]
[tex]\sf \frac{4}{1}[/tex]
[tex]\sf 4[/tex] mi/h
unit rate for lucy:
[tex]\sf \frac{y-y1}{x-x1}[/tex]
[tex]\sf \frac{20-0}{8-0}[/tex]
[tex]\sf \frac{20}{8}[/tex]
[tex]\sf 2.5[/tex] mi/h
