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Question

Find y when x=20 if y varies directly as x, and y=37 when x=10

Answer 1

Nicely done! Very easy to follow.

Answer 2

y = kx (y varies directly as x)

need to find variation constant k

solve for k when y=37 and x = 10

37 = k10

k = 3.7

so y = 3.7x

find y when x = 20

y = 3.7 * 20 = 74