Chapter 5 - Linear Functions - 5-2 Direct Variation - Practice and Problem-Solving Exercises - Page 297: 34

Part 1: The constant of variation can be computed by plugging in the blood quantity for y and the person's body weight for x. Part 2: Yes, an equation can be written (using the constant found in Part 1). The equation is $y = .02875 *x$ Part 3: The second person's weight can be entered into the equation, and this value can be multiplied by the constant to find the quarts of blood for the second person.

Part 1: $y = k*x$ $4.6 = 160 * x $ $4.6/160 = 160 * x / 160$ $.02875 = x $ Part 3: $y = .02875 * x$ $y = .02875 * 175$ $y = 5.03125$