y varies directly with t and indirectly with x. When x 4 and t 2, then y 1. Find an
Chapter 3, Problem 55(choose chapter or problem)
y varies directly with t and indirectly with x. When x 4 and t 2, then y 1. Find an equation that describes this variation. Solution: Write the variation equation. y ktx Let x 4, t 2, and y 1. 1 k(2)(4) Solve for k. Substitute into y ktx. This is incorrect. What mistake was made? y = 1 8
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