Answer :
Given:
Depth in inches of an object as it sinks in the river is found by the equation
[tex]d=0.5t[/tex]
where t is measured in seconds.
To find:
The best description for the constant of proportionality.
Solution:
We know that, in the equation [tex]y=kx[/tex], k is the constant of proportionality.
We have,
[tex]d=0.5t[/tex]
Here, constant of proportionality is 0.5.
Since, depth (y) in inches and time (t) in seconds, therefore the constant of proportionality id 0.5 inches per second.