Question

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Fascinated by ocean life, Hannah wants to put a saltwater aquarium in her bedroom. She needs to make sure she buys a big enough tank to grow her collection of fish over time.
This table shows the relationship between the number of fish in Hannah's collection, x, and the smallest tank size (in gallons), y, she needs to safely keep her fish.
x (fish) y (gallons)
2 18
7 63
8 72
10 90
According to the values in the table, do x and y have a proportional relationship?
yes
no
Write an equation for the relationship between x and y. Simplify any fractions.

Answer 1

Yes, x and y have a proportional relationship.

The equation for the relationship between x and y is y = 9x.