if y varies directly with x and y =28 when x = 4 what is y when x = 3 show all your work

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27-10-2020
Mathematics

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if y varies directly with x and y =28 when x = 4 what is y when x = 3 show all your work

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Dirtyfacebabyaj Dirtyfacebabyaj · Answer 1 · 2020-10-27T20:02:00+01:00

Dirtyfacebabyaj Dirtyfacebabyaj

27-10-2020

Answer: y = 4x

Step-by-step explanation:

the initial statement is

y

∝

x

to convert to an equation multiply by k the constant

of variation

⇒

y

=

k

x

to find k use the given condition

y

=

28

when

x

=

7

y

=

k

x

⇒

k

=

y

x

=

28

7

=

4

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