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Pre-Algebra Proportional relationships

Proportional relationships

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Question 1
177991
Two quantities \(x\) and \(y\) are in a \(\textbf{proportional relationship}\). Which of the following best describes this relationship?
A.
\(y\) can be written as \(y = kx\) for some constant \(k\), where \(k \neq 0\)
B.
\(y\) can be written as \(y = x + k\) for some constant \(k\)
C.
\(y\) is always equal to \(x\)
D.
\(y\) increases whenever \(x\) increases
\(y\) can be written as \(y = kx\) for some constant \(k\), where \(k \neq 0\)

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