1. Which letter has rotational symmetry? A. C B. M C. O D. E Hint 2. Determine the slope of the line graphed below. A. B. C. D. 0 Hint 3. Use elimination to solve the system of equations shown below.2x - 4y = -53x + 4y = -15 A. B. C. D. Hint 4. How many lines of symmetry does the figure shown below have? A. 4 B. 2 C. 0 D. 1 Hint 5. Solve the equation x2 = 0.81. A. x = -0.9 only B. x = 0.9 or x = -0.9 C. none of these is correct D. x = 0.9 only Hint 6. Find the equation that contains a decreasing linear relationship. A. y = 4x – 3 B. y = 5 – 6x C. y = 10 + x D. y = 12+ 2x Hint 7. Michael just got a job mowing his elderly neighbor's lawn paying him \$10 each week. Draw a graph showing the amount he receives is increasing very rapidly. Suppose you graph the time in weeks on the horizontal axis and the amount Michael receives on the vertical axis. A. B. C. D. Hint 8. Write the equation in slope-intercept form.–6x = –10 – 2y A. y = 3x + 8 B. –6x + 2y + 10 = 0 C. y + 8 = 3(x + 1) D. y = 3x – 5 Hint 9. Find the graph of y = x2. A. B. C. D. Hint 10. Find the graph of y = x2 + 1. A. B. C. D. Hint 11. Describe the location of the line of symmetry of the graph of y = x2 – 2. A. there is no line of symmetry B. the line y = x C. the horizontal axis D. the vertical axis Hint 12. Which equation is in the same family as y = x2? A. y = 2x – 3 B. y = x3 – 3 C. y = x2 – 3 D. y = 2x2 – 3 Hint 13. Find a quadratic equation for the table. A. y = 5x2 – 1 B. y = 5x2 – 2 C. y = x2 – 5 D. y = 5x2 + 1 Hint 14. Find the cubic equation. A. y = 5x3 + 2x B. y = x(x3 + 1) C. y = x2 + 5 D. y = 3x Hint 15. How does a affect graphs of equations in the form of ? A. a affects the length of the graph B. a affects the width of the graph C. negative values of a move the graph to the left, positive values move it to the right D. positive values of a move the graph to the left, negative values move it to the right Hint 16. Consider the following conjecture. If an even number is written 2k, where k is a whole number, then 2k + 1 must be an odd number. What can be your next course of action in dealing with this conjecture? A. find a counterexample to disprove the conjecture B. develop an argument to prove the conjecture C. test every possible case to prove the conjecture D. all answers are correct Hint 17. Tell whether the statement is sometimes true, always true, or never true for positive values of n. If it is sometimes true, state for what value it is true.4n = 6,561. A. sometimes true, n = 7 B. always true C. never true D. sometimes true, n = 8 Hint 18. Julian said, ''I'm thinking of a number. When I add 3 to my number, multiply the sum by 12, divide the product by 8, and subtract the result by 7, I get 11. What is the number I'm thinking of?'' A. 8 B. 9 C. 10 D. 7 Hint 19. A figure has rotation symmetry of 8°. How many identical parts must there be? A. 272 B. 70 C. 45 D. 40 Hint 20. Scale the figure below by. A. B. C. D. Hint