Given
It is given that machine print 63 booklets in 6 hours.
Explanation
To determine the proportion could be used to determine ask the number of booklet that the machine can print it nine hours.
Use the unitary method,
In 6 hours booklets print is 63.
In 1 hour , booklets print is
[tex]\frac{63}{6}[/tex]
In 9 hour , the booklets print is
[tex]\frac{63}{6}\times9[/tex]
Answer Hence the proportion formed is
[tex]\frac{63}{6}=\frac{x}{9}[/tex]
The correct option is b.
