1. Three out of the four equations listed below are equations of lines that are parallel to each other. Which equation does not have a graph that is a line parallel to the other three? A. B. 8y = - 6x C. 3x + 4y = -16 D. Hint 2. Which graph represents the solution to x + 4 > -2? A. B. C. D. Hint 3. Use elimination to solve the system of equations.-x + 2y = 18x + 8y = -38 A. B. (-22, -2) C. (-5, -1) D. Hint 4. Find the equation that has direct variation. A. y = 4x B. y = –3x – 1 C. y = 5x + 1.3 D. y = 0.8x + 9 Hint 5. Find the situation that involves a decreasing linear relationship and has direct variation. A. The temperature that begins at 0°F at 6:00 a.m. rises 3°F every hour for 6 hours. B. A bucket that begins at ground level and is lowered into a well at a rate of 1 foot per second. C. A submarine that begins at the bottom of the ocean and is raised to the surface of the water at 15 meters per second. D. An airplane that begins at 20,000 feet and descends for a landing on the ground at the airport. Hint 6. Find the table that represents a graph with direct variation. A. B. C. D. Hint 7. Describe the location of the line of symmetry of the graph of y = x2 – 2. A. the vertical axis B. the line y = x C. there is no line of symmetry D. the horizontal axis Hint 8. How many diagonals are connected to each vertex for a 25-sided polygon? A. 21 B. 20 C. 22 D. 25 Hint 9. Find the cubic equation. A. y = x2 + 5 B. y = x(x3 + 1) C. y = 5x3 + 2x D. y = 3x Hint 10. Solve for y in terms of x.xy = 100 A. y = 100x B. x = C. y = D. y = Hint 11. What is the reciprocal of ? A. B. C. D. Hint 12. Consider the equation . What happens to the value of y when x is divided by 4? A. y is divided by 4 B. y is subtracted from 4 C. y is added to 4 D. y is multiplied by 4 Hint 13. What type of relationship does the equation have if its first differences are constant? A. constant B. cubic C. quadratic D. linear Hint 14. Find the values for m and n which the conjecture (m – n)2 = m2 – n2 is false. A. m = –2, n = 0 B. m = 1, n = 1 C. m = 1, n = 2 D. m = 1, n = 0 Hint 15. Suppose your parents buy a new car for \$21,000. What will the value of the car be in 5 years if the car depreciates by 10% each year.? A. \$12,400 B. \$10,044 C. \$15,309 D. \$11,160 Hint 16. Find a solution to the equation using backtracking. A. a = –2 B. a = 5 C. a = 2 D. a = 3 Hint 17. Find a solution to the equation using backtracking. A. c = 8 B. c = –14 C. c = 2 D. c = –1 Hint 18. John and Margaret have both ridden on the roller coaster called The Scream. Margaret has ridden it eight more than three times the number than John has. She also has ridden it five times the number John has. How many times has John ridden The Scream? A. 3 B. 6 C. 4 D. 20 Hint 19. Use a graphing calculator to graph y = 8x – 2x2. Estimate the highest point on the graph. A. (2, 8) B. (7, 3) C. (3, 7) D. (8, 2) Hint 20. Use you calculator's Table feature to approximate the solutions to the nearest hundredth.x(x – 7) = 36 A. x = 3.26, x = 6.31 B. x = –15.96, x = –1.15 C. x = 11.00, x = –2.01 D. x = 10.45, x = –3.45 Hint