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Question : What rate you trying to find?
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What rate are you trying to find?

Write an equation relating *x* and *y* . Note: In order for WeBWorK to check your answer you will need to write your equation so that it has no denominators. For example, an equation of the form 2/x = 6/y should be entered as 6x=2y or y = 3x or even y - 3x = 0.

Use the chain rule to differentiate this equation and then solve for the unknown rate, leaving your answer in equation form.

Substitute the given information into this equation and find the unknown rate. Express your answer in the form dx/dt or dy/dt = a number.

Two cars start moving from the same point. One travels south at 60 mph and the other travels west at 25 mph. At what rate is the distance between the cars increasing 2 hours later? Let Let Let In this problem you are given What rate are you trying to find? Write an equation relating Use the chain rule to differentiate this equation and then solve for the unknown rate, leaving your answer in equation form. Substitute the given information into this equation and find the unknown rate. Express your answer in the form dx/dt or dy/dt = a number. |