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Tanya [424]
3 years ago
12

Assume that y varies directly with x, then solve.if y=-6.6 when x=9.9, find y when x=6.6​

Mathematics
1 answer:
vladimir1956 [14]3 years ago
3 0

Answer:

y = - 4.4

Step-by-step explanation:

Given that t varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = - 6.6 when x = 9.9 , that is

- 6.6 = 9.9k ( divide both sides by 9.9 )

k = \frac{-6.6}{9.9} = - \frac{2}{3}

y = - \frac{2}{3} k ← equation of variation

When x = 6.6, then

y = - \frac{2}{3} × 6.6 = - 2 × 2.2 = - 4.4

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