Y varies directly as x, if y=9 x=3 find x when y=-27
1 answer:
Answer:
x = -9
Step-by-step explanation:
Standard equation of direct variation:
y = kx
We need to find k.
We use the given point.
When x = 3, y = 9.
9 = k * 3
k = 3
Our equation is
y = 3x
Now we find x when y = -27.
y = 3x
-27 = 3x
x = -9
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