When two variables are in a proportional relationship, which of the following is true about their values. *

their sums are a constant

their differences are a constant

their products are a constant

their quotients are a constant
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Their quotients are a constant

Step-by-step explanation:

Required

Quotient of two variable

Let the variables be x and y

The quotient of x and y in this case is their constant of variation.

Take for instance:

Their quotient is calculated as follows:

Notice that the quotient has a constant value of 2.

However, the sum, difference or products will give a different set of values entirely.

Hence, option (d) is correct

i would need to see the dot plot : )