jr218
Answered

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Find the constant of variation for the relation and use it to write an equation for the statement. Th
a.
C.
If y varies directly as x, and y = 7 when x = 3, find y when x = 7
7
49
49
Y =
343
3
y = 5%; y(7) =
3
3
3
b. 3
d. y = 7x; y(7) =49
y = 3*; y(7) =3
Please select the best answer from the choices provided

Find The Constant Of Variation For The Relation And Use It To Write An Equation For The Statement Th A C If Y Varies Directly As X And Y 7 When X 3 Find Y When class=

Sagot :

Answer:

A

Step-by-step explanation:

Given that y varies directly as x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 7 when x = 3 , then

7 = 3k ( divide both sides by 3 )

[tex]\frac{7}{3}[/tex] = k

y = [tex]\frac{7}{3}[/tex] x ← equation of variation

When x = 7 , then

y = [tex]\frac{7}{3}[/tex] × 7 = [tex]\frac{49}{3}[/tex]

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