A few days ago
HELP! The variables x and y vary directly. Write an equation that relates x and y. Then find x when y = -4.?
1. x = -6, y =8
2. x = -12, y = 84
THANKS!
Top 1 Answers
A few days ago
Favorite Answer
to vary directly, they must be in the format y = kx where k is a constant value
so
8 = -6k
divide both sides by -6
-(4/3) = k
y = -(4/3)x
-4 = -(4/3)x
3 = x
2. 84 = -12k
divide by -12
k = -7
y = -7x
-4 = -7x
x = 4/7
hope this helps
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