''x ∝ y'' is the equation that represents the proportional relationship between the amount of fish and the number of calories consumed.
There are two types of proportional relationships i.e. direct proportional and inverse proportional relationship. In direct proportional relationship, we write the equation in ''x ∝ y'' from which means that if one increases the value of other also increases.
While on the other hand, in inverse proportional relationship, we write the equation in ''x ∝ 1/y'' which means that if one increases the value of other also decreases and vice versa so we can conclude that the equation of proportional relationship is ''x ∝ y''.
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