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What is the constant of variation k of the direct variation y=kk, through (5,8)

What is the constant of variation k of the direct variation y=kk, through (5,8)-example-1

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SOLUTION:

We are to find the constant of variation k, of the direct variation, y = k x through (5, 8).

x = 5

y = 8

y = k x

8 = k (5)

8 = 5k

or

5k = 8

Dividing both sides by 5

k = 8/5 (option D)

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