1. The cost function for a company to produce x items is y = 56 + 2x and the revenue function is y = 3.6x. Graph the system of equations, and find the break-even point. A. 45 items B. 35 items C. 30 items D. 40 items Hint 2. The cost function for a company to produce x items is y = 22.5 + 2x and the revenue function is y = 2.5x. If the profit is the revenue minus the cost, what is the profit at the break-even point? A. \$63 B. \$0 C. \$112.50 D. \$75 Hint 3. Solve the system of equations y = -x + 5 and y = -x - 10 by graphing. A. None of these is correct. B. (5, 2) C. no solution D. (2, 5) Hint 4. Find the solution of the system y = 3x – 2 and y = -2x – 7. A. (-1, -6) B. No Solution C. (-2, -5) D. (-1, -5) Hint 5. Park A and Park B each have a bicycle trail. The cost of renting a bicycle at Park A is \$1.50 for hour plus a \$2.00 rental fee, which is modeled by the equation y = 1.5x + 2. The cost of renting a bicycle at Park B is \$2.00 per hour plus \$1.00 rental fee, which is modeled by the equation y = 2x + 1. At what time will the cost be equal for renting a bike at Park A and Park B? A. 1.5 hours B. 2.5 hours C. 2 hours D. 1 hour Hint