y varies directly with x . If y is - 12 when x is 2, find x when y is - 30.
A) x = - 3
B) x = 3
C) x = 2
D) x = - 5
E) x = 5

Name: y varies directly with x . If y is - 12 when x is 2, find x when y is - 30. A) x = - 3 B) x = 3 C) x = 2 D) x = - 5 E) x = 5
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Question

Quizplus · Accepted Answer

Since y varies directly with x, we have y = kx for some constant k. Given y = -12 when x = 2, we find k = -12/2 = -6. For y = -30, we solve -30 = -6x, giving x = 5.

Y Varies Directly with X