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OpenStudy (anonymous):
Write an appropriate direct variation equation if y = 30 when x = -10. A. y = -300x B. y = 300x C. y = -3x D. y = 3x
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OpenStudy (kenljw):
when x is - so is y that eliminates A and C y is 3 times the value of x therefore D
OpenStudy (jim766):
y = kx 30 = k(-10) --- ---- -10 -10 -3 = k , y = -3x
OpenStudy (jim766):
make sense?
OpenStudy (kenljw):
sorry saw a -30 when it was 30
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