1. Graph the equation A. B. C. D. Hint 2. An equation written in the form y = mx + b is in A. x-intercept form B. point-slope form C. slope-intercept form D. y-intercept form Hint 3. Determine whether the relation {(7, 2), (-10, 3), (-5, -1), (7, 3)} is a function. Explain. A. Yes, because every relation is a function. B. No, because there are two elements in the domain that are paired with the same element in the range. C. Yes, because each element in the domain is paired with exactly one element in the range. D. No, because there is an element in the domain that is paired with two elements in the range. Hint 4. Select the relation that is a function. A. {(21, 11), (21, 10), (21, 9), (21, 8)} B. {(5, 10), (-3, 10), (-3, -10), (4, 7)} C. {(-2, -1),(5, -1), (16, 3), (-3, -9)} D. {(-6, -5), (3, 2), (10, 8), (3, 3)} Hint 5. Solve y – 7x = 10 for y. A. y = 7x + 10 B. y = 7x – 10 C. y = 10 – 7x D. y = x + 10 Hint 6. Find the slope of the line. A. B. C. D. -3 Hint 7. Find the slope of the line that passes through (-10, 5) and (2, 5). A. 0 B. undefined C. -8 D. -12 Hint 8. Suppose y varies directly with x and y = -10 when x = 5. Write an equation relating x and y. A. B. y = -2x C. D. y = 2x Hint 9. Graph using the slope and y- intercept. A. B. C. D. Hint 10. Write an equation in slope-intercept form of a line with slope 5 and y- intercept –7. A. y = 5x – 7 B. x = 5y + 7 C. y = 5x + 7 D. x = 5y – 7 Hint 11. Write an equation in slope-intercept form for the line graphed. A. B. C. D. Hint 12. A scatter plot contains the points (2, 8) and (19, 59). Write an equation in slope-intercept form for the best-fit line of the scatter plot. A. B. y = 3x + 2 C. D. y = -3x + 15 Hint 13. Write an equation in slope-intercept form for the best-fit line of a scatter plot with points (7, 22) and (13, 25). A. y = 2x + 8 B. y = -2x + 36 C. y = -0.5x + 25.5 D. y = 0.5x + 18.5 Hint 14. The graph shows the population of Allen, Texas. In which decade was there the greatest population change? A. 1990-2000 B. 1980-1990 C. 1970-1980 D. constant rate of change Hint 15. The graph shows the high temperature for Austin, Texas during the week of July 13-19, 2005. Between which days was there the greatest temperature change? A. 16-17 B. 15-16 C. 13-14 D. 14 - 15 Hint 16. Find the approximate constant rate of change for the linear function. A. 5 B. 15 C. 0.5 D. 0.3 Hint 17. What is the range of the relation {(5, −1), (−3, −7), (6, 0)}? A. {−7, −3, −1, 0, 5, 6} B. {5, −3, 6} C. {−1, −7, 0} D. {5, −1} Hint 18. Point A is located 3 units to the right of the origin and 5 units down from the origin. What are the coordinates of point A? A. (−3, −5) B. (3, 5) C. (3, −5) D. (−3, 5) Hint