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damaskus [11]
3 years ago
15

The variables y and x have a proportional relationship, and y = 5 when x = 4.

Mathematics
1 answer:
MrRissso [65]3 years ago
3 0

If the variables y and x have a proportional relationship, we have

xy=k

Since (x,y)=(4,5) is a valid pair, we know that

xy=20

So, if y = 8, we have

8x=20 \iff x=\dfrac{20}{8}=\dfrac{5}{2}

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