Final answer:
The constant of proportionality in the given relationship is 1.75
Step-by-step explanation:
The constant of proportionality can be determined by comparing the values of x and y in the given proportional relationship.
To find the constant of proportionality, we need to find the ratio between any pair of corresponding values of x and y. Let's choose the values x = 4 and y = 7 as an example:
constant of proportionality = y/x = 7/4 = 1.75
So, the constant of proportionality in the given relationship is 1.75 (written as a decimal).