If the reduced row echelon form of lA bl contains a zero row. then Ax = h mu>t be con>istent.

Lecture 21: Related Rates (Section 3.11) Related Rates allows us to ﬁnd the rate of change of one quantity in terms of the rate of change of a related quantity. Consider the following example: Ap itim viglnghegaho fefncin 1 y = 1+ x 2 3 so that the velocity in the x direction is 2 cm/min. What is 1 the velocity in the y direction as it passes through (−2, ) What about when x =1 5