1. Determine the slope of the line that passes through (2, 2) and (5, 8). A. 2 B. -2 C. D. Hint 2. Which equation is the slope-intercept form of the equation of the line that passes through (1, 2) and is parallel to 4x - 2y = 6? A. y = -2x + 1 B. y = 4x + 3 C. D. y = 2x Hint 3. Which pair of lines graphed below are parallel? A. l and m B. l and n C. k and n D. k and m Hint 4. The table shows the possible lengths and widths of a rectangle that has an area of 72 square centimeters. Make a scatter plot of the data. A. B. C. D. Hint 5. What is the slope of the line through the points A(-3, 4) and B(2, -1)? A. 1 B. -1 C. D. -3 Hint 6. What is the equation of the graph shown? A. y = x2 + 2x + 1 B. y = x2 - 2x + 1 C. y = -x2 - 2x - 1 D. y = -x2 +2x - 1 Hint 7. What is the equation of the graph shown? A. f(x) = -2x2 + 2x + 1 B. f(x) = 2x2 - 2x + 1 C. f(x) = 2x2 + 2x + 1 D. f(x) = -2x2 + 2x - 1 Hint 8. Find the table that represents a graph with direct variation. A. B. C. D. Hint 9. What is the equation of a line that has a slope of 3 and passes through (–4, –3)? A. y = 3x – 3 B. y = 3x + 3 C. y = 3x – 9 D. y = 3x + 9 Hint 10. Which three points are collinear? A. (1, 2), (–3, –2), (–2, –4) B. (3, –1), (2, 5), (2, –3) C. (–5, 2), (1, 1), (4, 4) D. (–4, 4), (0, –4), (–1, –2) Hint 11. Find the graph of y = x2. A. B. C. D. Hint 12. Which table shows a quadratic relationship? A. B. C. D. Hint 13. Two friends are playing catch with a baseball. The ball's flight can be modeled by the equationy = 1 + 0.6x – 0.08x2, in meters. What is the height of the ball at its highest point? A. 1 m B. 2.13 m C. 3.78 m D. 18.8 m Hint 14. What is the new equation if the graph y = 2x3 – 6x2 is moved down 1 unit? A. y = 2x3 – 5x2 B. y = 2x3 – 6x2 – 1 C. y = x3 – 6x2 D. y = 2x3 – 6x2 + 1 Hint 15. What is the reciprocal of ? A. B. C. D. Hint 16. How does a affect graphs of equations in the form of ? A. a affects the width of the graph B. a affects the length 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 17. What type of relationship does the equation have if its first differences are constant? A. cubic B. quadratic C. constant D. linear Hint 18. What is the relationship between constant second differences and the coefficient of the equation? A. the second difference is the same as the coefficient B. the second difference is opposite the coefficient C. the second difference is –2 times the coefficient D. the second difference is 2 times the coefficient Hint 19. 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. test every possible case to prove the conjecture B. develop an argument to prove the conjecture C. all answers are correct D. find a counterexample to disprove the conjecture Hint 20. Find the values for m and n which the conjecture (m – n)2 = m2 – n2 is false. A. m = 1, n = 0 B. m = 1, n = 1 C. m = 1, n = 2 D. m = –2, n = 0 Hint