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Find the constant of variation k. Write the answer as an integer or simplified fraction.

y varies directly as X. When x = 9, y = 18.

Respuesta :

semsee45

Answer:

k = 2

Step-by-step explanation:

y varies directly as x:     y = kx   (for some constant, k)

when x = 9 and y = 18:       18 = 9k

                                         ⇒ 2 = k

Therefore, k = 2

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