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If y varies directly as x, and y is 20 when x is 4, whats this relation?
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If y varies directly as x, and y is 20 when x is 4, whats this relation?

User Kapsonfire
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y α x

y = kx

20 = k*4

20 = 4k

20/4 = k

5 = k

k = 5

Relationship is y = kx , that is y = 5x
User Jdramer
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