There is also a graph i can't move it.

Building Isochrons and Determining the Ages of Three Rocks
Page 15 of 17
For each of the three rocks listed below follow these steps to determine the rock's age of formation.
1. Prepare an isochron by plotting the points that represent the amounts of isotopes Rb-87 and Sr-87. (The values are RATIOS of parent and daughter to the stable isotope, Sr-86. Mass spectrometers measure ratios and not absolute amounts.) Plotting Instructions
2. Click "Verify Points" and then use the "regressor" to find the slope and intercept of the line that Best Fits the points. The process, called "Least Squares," will result in the best value for the slope. Regressor Instructions
3. The age of the rock will be calculated for you. After you minimize the error term, click the "Verify Age" button, and if age is OK, transfer the rock's age to the table on the right. After completing table, click the "Next" button to receive your CERTIFICATE of completion as a Geochronologist.


Sample
Locality
Age (Million years)

Granite Scottish Highlands

Gabbro Sudburry, Canada

Gneiss Greenland

To move the graph, you may need to follow the instructions provided in the exercise or the software you are using to work with the graph. Here are the steps to follow to determine the rocks' ages of formation:

1. Prepare an isochron by plotting the points that represent the amounts of isotopes Rb-87 and Sr-87. You will need to plot the ratios of parent and daughter isotopes to the stable isotope Sr-86.

2. After plotting the points, click the "Verify Points" button. This step will help ensure that the points are correctly plotted on the graph.

3. Next, you will need to use the "regressor" in the software to find the slope and intercept of the line that best fits the points on the graph. This process, called "Least Squares," will provide you with the best values for the slope and intercept.

4. Once you have determined the slope and intercept, the age of the rock can be calculated for you. Minimize the error term by adjusting the parameters in the regressor.

5. After minimizing the error term, click the "Verify Age" button to check if the calculated age is acceptable. If the age is within the acceptable range, you can transfer the rock's age to the table on the right.

6. Repeat these steps for each rock listed (Granite, Gabbro, Gneiss) and fill in the corresponding ages in the table.

7. Finally, once you have completed the table, you can click the "Next" button to receive your certificate of completion as a Geochronologist.

Note: The specific steps and buttons may vary depending on the software or program you are using. Make sure to refer to the provided instructions or consult the software's user guide for more accurate guidance on how to move the graph and complete the analysis.

Plot the point, verify them, it will tell you if they are good, and for the age verificacion is quitte the same.