Question

Find the equation of variation in which y varies directly as x and y=21 when x=7. Then find the value if y when x=12

Answer 1

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Answer 2

Answer:

y - 26

Step-by-step explanation:

y varies directly as x.

y = kx

y = 21 when x = 7.

21 = k (7)

k = 21 ÷ 7

k = 3

Therefore,

y = 3x

When x = 12,

y = 3(12)

y = 36