A point moves along the curve

MATHEMATICS · Subjective · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation

Problem

xy = 9

. When the point is at

(x,y) = (3,3)

, its

y

–coordinate is decreasing at

0.4

units per second. Determine

dx/dt

at that instant, including units.