Answer: It is a proportional relationship because a proportional relationship is known as a relationship between two quantities, in which the ratio of one quantity to the other quantity is constant.
Step-by-step explanation:
Y = 4x
hope that helps
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I am guessing the answer is C.
since X seem to be a full 90-degree angle, and y is also 45 degrees.
The 1st equation can be factored into

you can apply the zero product rule now.
Where are the following equations?