Determine if there is a proportional relationship between the two quantities. Explain your reasoning.

Answer:
Hold on a minute, gotta let my brain wake up.
Step-by-step explanation:
Two quantities are proportional if their ratio is constant. Let's check the ratios:
[tex]\dfrac{20}{8}=2.5,\quad \dfrac{12.5}{5}=2.5[/tex]
So, the two quantities appear to be proportional, and the constant seems to be 2.5.