Question

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

Answer 1

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