Solve the problem.
-y varies directly as z and y = 120 when z = 10. Find y when z is 18.
A) 144
B) 100
C) 216
D) 324

Name: Solve the problem. -y varies directly as z and y = 120 when z = 10. Find y when z is 18. A) 144 B) 100 C) 216 D) 324
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Question

Quizplus · Accepted Answer

Since y varies directly as z, the formula is y = kz, where k is the constant of variation. Given y = 120 when z = 10, we find k = 120/10 = 12. To find y when z = 18, substitute z = 18 into y = 12z, giving y = 12*18 = 216.

Solve the Problem. -Y Varies Directly as Z and Y = 120 When