1. Graphing Review

2. Identify the location of the independent variable and dependent variables on a graph. The INDEPENDENT variable is ALWAYS located on the X-axis. The DEPENDENT variable is ALWAYS located on the Y-axis.

3. Describe what has to be done when placing a scale on the X and Y-axis. The scales on the X and Y- axis must have a CONSISTENT INTERVAL. For example: – By 1’s  1, 2, 3, 4, 5, 6, 7… – By 2’s  2, 4, 6, 8, 10, 12… – By 5’s  5, 10, 15, 20, 25… – By 10’s  10, 20, 30, 40, 50… – By 25’s  25, 50, 75, 100, 125, 150… Be sure to skip the same number of boxes in between each number on your scales.

4. What must you remember when you are required to “State the relationship between…..” ? Your answer must always start with “As the INDEPENDENT VARIABLE increases, the DEPENDENT VARIABLE…” Fill in the correct independent variable and dependent variable into the sentence. To complete the sentence explain what the line is doing. Examples: – Increases – Decreases – Remains the same – Increases and then decreases

5. Why do scientists make graphs of data from experiments? 1.to observe general trends and patterns in the data 2.to make the observed data more accurate 3.to prevent errors in measuring data 4.to help change the original data tables

6. 10 23 39 48 64 77 87 98 INCORRECT!!! The scale has no CONSISTENT interval. Is the scale on the x-axis correct? Support your answer.

7. 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 CORRECT!!! The scale has a CONSISTENT interval. It goes by 5’s. Is the scale on the x-axis correct? Support your answer.

8. 10 15 20 25 30 35 40 45 50 55 INCORRECT!!! The number of boxes between the numbers is not the same. Is the scale on the x-axis correct? Support your answer.

9. 50 55 60 65 70 75 80 85 90 CORRECT!!! The number of boxes between numbers is the same. There is a consistent interval. Is the scale on the x-axis correct? Support your answer.

10. 20 40 60 80 100 120 CORRECT!!! There is a consistent interval. The number of boxes between each number is the same. Is the scale on the x-axis correct? Support your answer.

11. 0 10 20 60 65 70 75 80 85 90 CORRECT!!! No consistent interval. Is the scale on the x-axis correct? Support your answer.

12. 0 10 20 60 65 70 75 80 85 90 INCORRECT!!! The numbers are not beneath the lines. They are between the lines. Is the scale on the x-axis correct? Support your answer.

13. 5 10 15 20 25 30 35 20 40 60 80 100 120 140 160 180 200 220 240 260 280 Identify the independent variable. Water temperature Identify the independent variable. Average water flea heart rate

14. 5 10 15 20 25 30 35 20 40 60 80 100 120 140 160 180 200 220 240 260 280 State the relationship between the average water flea heart rate and water temperature. As water temperature increases, the average water flea heart rate increases.

15. 5 10 15 20 25 30 35 20 40 60 80 100 120 140 160 180 200 220 240 260 280 What is the average flea heart rate at 15ºC? 118 beats/min What is the average flea heart rate at 30ºC? 240 beats/min

16. Identify the independent variable. Support your answer. Identify the dependent variable. Support your answer. Daily amount of water Growth It is on the x-axis. It is on the y-axis.

17. State the relationship between the daily amount of water and growth. As the daily amount of water increases, the growth increases and then decreases.

18. Identify the independent variable. Support your answer. Reporting year Toxic chemicals released It is on the x-axis. Identify the dependent variable. Support your answer. It is on the y-axis.

19. State the relationship between the reporting year and the toxic chemical released. As the reporting year increases, the toxic chemical released decreases.

20. pH Percent maximum activity of trypsin Identify the independent variable. Support your answer. Identify the dependent variable. Support your answer. It is on the x-axis. It is on the y-axis.

21. State the relationship between the reporting year and the toxic chemical released. As the pH increases, the percent maximum activity of trypsin increases and then decreases.

22. Day Degrees in Fahrenheit Identify the independent variable. Support your answer. Identify the dependent variable. Support your answer. It is on the x-axis. It is on the Y-axis.

23. State the relationship between the days and the degrees in Fahrenheit. As the days increase, the degrees in Fahrenheit increases.

24. Days of the week Temperature Identify the independent variable. Support your answer. Identify the dependent variable. Support your answer. It is on the x-axis. It is on the y-axis.

25. State the relationship between the days of the week and the temperature. As the days of the week increase, the temperature increases, decreases and then increases again.

26. Time Speed Identify the independent variable. Support your answer. Identify the dependent variable. Support your answer. It is on the x-axis. It is on the y-axis.

27. State the relationship between time and the speed. As the time increases, the speed increases, remains the same, decreases, remains the same, increases and then remains the same.