Independent Practice #2
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1 All problems with answers or work are examples. Independent Practice #2 Section 1.1 Determine the independent and dependent quantities in each scenario. (1-2) 1. Phillip enjoys rock climbing on the weekends. At some of the less challenging locations he can climb upwards of 12 feet per minute. Label the axes of the graph that models each scenario with the independent and dependent quantities. (5-6) 5. Chloe is using a pump to drain her backyard pool to get ready for winter. The pump removes the water at an average rate of 15 gallons per minute. 2. Jose prefers to walk to work when the weather is nice. He walks the 1.5 miles to work at a speed of about 3 miles per hour. Choose the graph that best models each scenario. (3-4) 3. Each day Maria starts her walk to school at 7:45 AM. At 7:50 AM she stops at her friend Jenna s house. Jenna is usually late and Maria must wait at least 5 minutes for her to get ready. At 7:55 AM Maria and Jenna leave Jenna s house and arrive at school at 8:10 AM. Graph A Graph B Graph C 6. Jermaine is saving money to purchase a used car. He places $850 dollars in a savings account that earns 1.65% interest annually. Section 1.2 Each pair of graphs has been grouped together. Provide a rationale to explain why these graphs may have been grouped together. (7-8) 7. Graph A Graph B. 4. Hector is training to participate in competitive trampoline. In his best jump, he can reach a maximum height of about 9 meters and can spend about 2 seconds in the air performing tricks. Graph A Graph B Graph C
2 8. Graph A Graph B Determine whether each graph represents a function with an absolute minimum, an absolute maximum, or neither. (13-14) Determine whether the graph is discrete or continuous. (9-10) Determine whether each graph represents a linear function, a quadratic function, an exponential function, a linear absolute value function, a linear piecewise function, or a constant function. (15-16) Determine if each graph represents a function by using the Vertical Line Test. (11-12) Section 1.3 Rewrite each function using function notation. (17-18) 17. Rewrite the function using function notation so that the dependent quantity, defined as L, is a function of the independent quantity n. 18. Rewrite the function using function notation so that the dependent quantity, defined as A, is a function of the independent quantity m.
3 19. Choose the graph that represents each function. Use your graphing calculator. (19-20) Graph A Graph B Graph C Determine whether each graph represents an increasing function, a decreasing function, a constant function, or a combination of increasing and decreasing functions. (21-22) Section , where x is an integer Choose the appropriate function family or families to complete each sentence based on the given characteristic(s). (23-32) Graph A Graph B Graph C linear functions exponential functions quadratic functions linear absolute value functions 23. The graph of this function family does not have an absolute maximum or absolute minimum and is a smooth curve. The function family is linear equation 24. The graph of this function family has an absolute maximum or absolute minimum and is made up straight lines. The function family is 25. The graph of this function family is made up straight lines and does not have an absolute maximum or absolute minimum. The function family is 26. The graph of this function family decreases over the entire domain and is a smooth curve. The function family is 27. The graph of this function family is a straight line. The function family is
4 28. The graph of this function family has an increasing interval and a decreasing interval. The function family is 29. The graph of this function family has an absolute minimum. The function family is 30. The graph of this function family in decreasing over the entire domain. The function family is 35. Create an equation and sketch a graph that: is a smooth curve, is increasing across the entire domain, is continuous, and is exponential. 31. The graph of this function family forms a V shape. The function family is 32. The graph of this function family has an increasing interval and a decreasing interval and forms a U shape. The function family is Create an equation and sketch a graph for a function with each set of given characteristics. Use values that are any real numbers between and 10. (33-35) 33. Create an equation and sketch a graph that: is a smooth curve, is continuous, has a minimum, and is quadratic. f(x) = x 2 Choose the function family represented by each graph. (36-40) linear function quadratic function exponential function linear absolute value linear piecewise function function The graph represents a quadratic function Create an equation and sketch a graph that: is linear, is discrete, and is decreasing across the entire domain. 40.
5 Homework Packet Week #2 Answer Section 1. ANS: Independent quantity: time (minutes) Dependent quantity: distance climbed (feet) 2. ANS: Independent quantity: time (hours) Dependent quantity: distance (miles) 3. ANS: Graph B 4. ANS: Graph C 5. ANS: 6. ANS:
6 7. ANS: Both graphs have discrete data values. Both graphs are decreasing from left to right. Both graphs are functions. 8. ANS: Both graphs are increasing from left to right. Both graphs are functions. 9. ANS: The graph is continuous. 10. ANS: The graph is discrete. 11. ANS:
7 Yes. The graph is a function. 12. ANS: No. The graph is not a function. 13. ANS: The graph represents a function with neither an absolute minimum nor an absolute maximum. 14. ANS: The graph represents a function with an absolute maximum. 15. ANS: The graph represents a quadratic function. 16. ANS:
8 The graph represents a constant function. 17. ANS: 18. ANS: 19. ANS: Graph C 20. ANS: Graph A 21. ANS: The graph represents a decreasing function. 22. ANS: The graph represents a constant function.
9 23. ANS: exponential functions 24. ANS: linear absolute value functions 25. ANS: linear functions 26. ANS: exponential functions 27. ANS: linear functions 28. ANS: quadratic functions linear absolute value functions 29. ANS: quadratic functions linear absolute value functions 30. ANS: linear functions exponential functions 31. ANS: linear absolute value functions 32. ANS: quadratic functions
10 33. ANS: 34. ANS:, where x is an integer 35. ANS:
11 36. ANS: The graph represents a quadratic function. 37. ANS: The graph represents a linear function. 38. ANS: The graph represents a linear absolute value function. 39. ANS: The graph represents an exponential function. 40. ANS: The graph represents a linear piecewise function.
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