Final answer:
You can find the line graph option in Excel under the Insert tab, where you can create a chart to represent data, such as the least-squares regression lines, and visually analyze the relationship within the data. Option 1 is correct.
Step-by-step explanation:
When working with Microsoft Excel and looking to create a line graph, you would go to the Insert tab. Under this tab, you'll find various options for charts, including line graphs among others like pie graphs, and bar graphs. To create a line graph that adequately represents your data and to perform analysis such as calculating the least-squares regression lines, first enter your data into Excel.
Once your data is organized, select it, then navigate to the Insert tab to find the charts group. Here, you can select the desired line graph type to visually compare the slopes and fit of the lines to your data. To create a line graph in Excel, go to the Insert tab and follow these steps: select the data, click on Charts, choose Line, and Excel will insert the line graph using the selected data.