1. In a science experiment, students hung a cup from a spring and measured the length of the spring when candies were added to it. Their data are shown in the table below. Which statement is true? A. The relation is a function because the range values increase. B. The relation is not a function because only a line can be a function. C. The relation is not a function because there are two y values for some x values. D. The relation is a function because for each x value, there is exactly one y value. Hint 2. Find the y-intercept of the graph of 2x - 5y = 10. A. 2 B. -2 C. 0 D. 5 Hint 3. The temperature f(x) of water in a lake in degrees Fahrenheit is estimated by the function shown below, where x is the depth in feet of the water. What would be the temperature of water 30 feet below the surface? A. 111°F B. 33°F C. 71.25°F D. 63°F Hint 4. Find the slope-intercept form of an equation of the line that has a slope of and passes through (8,2). A. B. C. D. Hint 5. A best-fit line drawn on a scatter plot ________ A. must be drawn through the first and last data points. B. always has a positive slope. C. is a line that goes through every data point. D. approximates the linear relationship of data points. Hint 6. Choose the graph of f(x) = |x| - 2. A. B. C. D. Hint 7. Which equation describes graph A? A. y = | 2.25x | B. y = 2.25| x | - 1 C. y = 2.25x - 1 D. y = | x - 1 | Hint 8. Choose the line whose slope is undefined. A. B. C. D. Hint 9. When the equation is written in standard form, what is the value of B? A. -25 B. 25 C. D. Hint 10. Choose the line that has a slope of zero. A. B. C. D. Hint 11. Write the equation of the line through (5, -3) and (-2, -8) in slope-intercept form. A. B. C. D. Hint 12. When finding the equation for a line of fit for a scatter plot, you should use __________. A. all of the points on the plot B. the first and last points on the plot, with respect to the horizontal C. two points that you think represent the data well D. the point most characteristic of the scatter plot Hint 13. Choose the ordered pair that satisfies 7x – 15y < -13. A. (0, -2) B. (1, 1) C. (-2, 0) D. (2, -3) Hint 14. What is the inequality represented in the graph? A. 3x + 2y 0 B. 3x – 2y 0 C. 3x – 2y 0 D. 3x + 2y 0 Hint