1. Determine the slope of the line graphed below. A. B. C. D. 0 Hint 2. What is the slope of in parallelogram ABCD? A. B. C. D. Hint 3. A line of best-fit should not be drawn for which of the following graphs. A. B. C. D. Hint 4. 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. y = 2x D. Hint 5. 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. 3x + 4y = -16 C. D. 8y = - 6x Hint 6. 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 7. What is the slope of the line through the points A(-3, 4) and B(2, -1)? A. -3 B. 1 C. D. -1 Hint 8. Determine the slope of the line containing the points P(-7, -8) and Q(3, 0). A. B. -2 C. D. 2 Hint 9. Find the equation that has direct variation. A. y = 5x + 1.3 B. y = 4x C. y = –3x – 1 D. y = 0.8x + 9 Hint 10. Find the graph that does not have direct variation. A. B. C. D. Hint 11. Find the equation that contains a decreasing linear relationship. A. y = 5 – 6x B. y = 10 + x C. y = 12+ 2x D. y = 4x – 3 Hint 12. Find the situation that involves a decreasing linear relationship and has direct variation. A. A submarine that begins at the bottom of the ocean and is raised to the surface of the water at 15 meters per second. B. An airplane that begins at 20,000 feet and descends for a landing on the ground at the airport. C. A bucket that begins at ground level and is lowered into a well at a rate of 1 foot per second. D. The temperature that begins at 0°F at 6:00 a.m. rises 3°F every hour for 6 hours. Hint 13. Find the situation that is linear but does not have direct variation. A. At the beginning of the summer, Dina had \$200 in the bank. She withdrew \$30 to buy a new pair of shorts. B. At the beginning of the summer, Dina had \$200 in the bank. She started a job and deposited \$10 per week. C. At the beginning of the summer, Dina had \$0 in the bank. She started a job and deposited \$10 per week. D. At the beginning of the summer, Dina had \$0 in the bank. She earned \$50 mowing lawns the previous week and deposited the money in the bank. Hint 14. Find the graph that is nonlinear. A. B. C. D. Hint 15. 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 16. Pam's mother gives Pam \$20 each week for lunch to be bought at the school cafeteria. Lunches cost \$4 per day. Draw a graph showing the amount Pam has left decreasing very slowly. Suppose you graph the time in days on the horizontal axis and the amount Pam has left on the vertical axis. A. B. C. D. Hint 17. What is the equation of a line that has a slope of –1 and passes through (–2, 0)? A. y = –x – 2 B. y = –x + 2 C. y = –2x + 1 D. y = –x – 1 Hint 18. 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 – 9 C. y = 3x + 3 D. y = 3x + 9 Hint 19. Which line is parallel to the line listed below? A. B. C. D. y = 2x - 5 Hint 20. Which three points are collinear? A. (3, 1), (4, 0), (–1, 2) B. (4, –3), (2, –2), (–4, 1) C. (–5, –3), (–2, 3), (2, –4) D. (–1, 1), (2, 3), (5, 2) Hint