Answer:
one of the quantities is a constant multiple of the other, or equivalently if they have a constant ratio
Step-by-step explanation:
I'm guessing dilation of magnitude 6 centered at the origin
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The student would earn %86. To calculate percentage you take the amount of questions correct, divide that by the amount of questions given, multiply by 100 and round to the nearest percent.
About 400 marbles. You simply set up a proportion and solve it as I did in the photo attached.