Question

If y varies directly as x, and y = 36 as x = 9, find y for the x-value 5.

Answer 1

an equation for direct variation is:

y=kx

given your two points so far, you need to solve for K

36=k(9)

k=4

now that you know it's 4, find y for the x value of 5

y=(5)(4)

y=20

Answer 2

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