1. Suppose y varies directly with x, and y = 14 when x = -4. What is the value of y when x = -6
2 answers:
direct variation
y = kx
substitute in and solve for k
14 = k(-4)
14/-4 =k
k = -7/2
y = -7/2 x
y = -7/2 * -6
y = 42/2 = 21
Choice D
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