Mathematics, 26.09.2019 22:30 horcio8460

Does the equation below represent a relation, a function, both a relation and a function, or neither a relation nor a function?
y = x2 - 9x
a
a
function only
function only
b.
neither a relation nor a function
c.
relation only
d.
both a relation and a function
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Does the equation below represent a relation, a function, both a relation and a function, or neither...