Hi there!
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I believe your answer is:
[tex]y = 7x - 3\leftarrow \text{No.}\\\\y = 150x \leftarrow \text{Yes.}[/tex]
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Here’s why:
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[tex]\boxed{\text{General Proportional Formula:}}\\\\y = kx\\\rule{150}{0.5}\\$\bullet \text{ } k - \text{Constant of Proportionality}\\\rule{150}{0.5}\\\text{Since } y=150x \text{ is in this form, we can say that it is a proportional relationship.}\\\rule{150}{0.5}\\\text{We can also tell if something is proportional by graphing them.}[/tex]
[tex]\textbf{Proportional graphs go through the origin.}[/tex]
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Since y = 7x - 3 does not pass the origin, it is not proportional. However, y = 150x does, so it is proportional.
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Hope this helps you. I apologize if it’s incorrect.
