08-04-2016
Mathematics

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If y varies directly with x and x=21 and y=14, what is the constant of proportionality?

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penfila11Pen penfila11Pen

09-04-2016

Y varies directly with x
y = kx

y=14
x=21

14 = 21k

[tex] \frac{14}{21} [/tex] = [tex] \frac{21k}{21} [/tex]
21 and 21 cancels out

[tex] \frac{2}{3} [/tex] = k

The constant of this proportionality is [tex] \frac{2}{3} [/tex]

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