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Sergio039 [100]
3 years ago
14

If y varies directly as x, and y = 7 when x = 3, find y when x = 7

Mathematics
1 answer:
Sholpan [36]3 years ago
6 0

Answer:

<h2>A</h2><h3>Step-by-step explanation:</h3><h3></h3><h3></h3>

Direct variation, by definition, has the form shown below:

y=kx  

Where k is the constant of proportionality.

Given the information in the problem, you can find k:

7=3k

k=7/3

Now you can find y when x=7 as following:

y=(7/3)x

Substitute values.

y=(7*7)/3

y=49/3

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