Answer:
4 miles per hour
Step-by-step explanation:
Let the miles jogged be directly proportional to the hours taken hence we say that m=kh where m is miles, k is constant of proportionality and h is the number of hours. Making k the subject of the formula then [tex]k=\frac {m}{h}[/tex]. Substituting miles jogged with 3.5 miles and hours with 7/8 hours as given then
[tex]k=\frac {3.5}{7/8}=4[/tex]
Therefore, the constant of proportionality is 4 miles per hour
