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A point is moving along the graph of x yz = 3087. When the point is at (7,3), its x-coordinate is changing at the rate of - 3 units per minute. How fast is the y-coordinate changing at that moment? The y-coordinate is changing by units per minute. (Type an integer or a fraction. Simplify your answer.)Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 2p + x =93,750. Determine the rate at which sales are changing at a time when x = 250, p =25, and the price is falling at the rate of $.40 per week. The rate at which sales are changing is thousand units per week.Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 5p + 5x + 3px = 85. Suppose also that p and x are both functions of time, measured in days. Find the dp rate at which x is changing when x = 3, p = 5, and dt - =1.7. . . . The rate at which x is changing is sale(s) per day. (Round to the nearest hundredth as needed.)