Answer :
The constant of proportionality between earnings and time in hours is equal to 21.1.
How to determine the constant of proportionality?
In Mathematics, a proportional relationship is a type of relationship that generates equivalent ratios and it can be modeled or represented by the following mathematical expression:
y = kx
Where:
- x represents the time (hours).
- y represents the earnings (dollars).
- k represents the constant of proportionality.
In order to have a proportional relationship and equivalent ratios, the variables x and y must have the same constant of proportionality.
Next, we would determine the constant of proportionality (k) as follows:
y = kx
Constant of proportionality (k) = y/x
Constant of proportionality (k) = 274.30/13 = 337.60/16 = 464.20/22
Constant of proportionality (k) = 21.1
Read more on proportionality here: brainly.com/question/12866878
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