A few days ago
Anonymous

HELP! The variables x and y vary directly. Write an equation that relates x and y. Then find y when x = 12?

1. x = 4, y = 8

2. x = -4.8, y = -1.6

THANKS!

Top 1 Answers
A few days ago
hayharbr

Favorite Answer

If they vary directly their ratio is constant. So in #1, x/y = 4/8; cross multiply 4y = 8x; divide by 4: y = 2x. Then plug in 12 for x to get y
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