The equation y=[tex]31x^{2} +91+20[/tex] is relation but not a function.
Given a equation y=[tex]31x^{2} +91+20[/tex].
We are required to tell whether the equation is a relation, function or both.
The given equation is relation but not a function.
A relation is basically defined as the relationship between sets of values of ordered pairs. The set of elements in the first set are called domain and the element in second set is codomain and range.
Function is relationship between two or more variables which is mostly expressed in equal to form.
In a function two values of x cannot have one value of equation.
In the given function when we put a negative value and positive value we will get equal answer.
Hence the equation y=[tex]31x^{2} +91+20[/tex] is relation but not a function.
Learn more about function at https://brainly.com/question/10439235
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