Final answer:
To add 12 months to row 2 and fill the gym membership price of $10 a month through December, use AutoFill on row 2, starting from the cell with $10.
Step-by-step explanation:
AutoFill is a convenient feature in spreadsheet software that allows users to quickly populate cells with a series of data based on a pattern. In this case, to add 12 months to row 2, click and drag the small square at the bottom right corner of the cell containing the starting date. This action will generate a sequence of dates for the next 12 months in the cells of row 2.
Once the dates are populated, to fill the gym membership price of $10 a month through December, enter $10 in the starting cell and use AutoFill again. Click and drag the small square in the bottom right corner of the cell containing the $10, and the software will automatically fill the subsequent cells with the same value, maintaining the $10 gym membership price for each month.
This process is efficient for extending a pattern across a range of cells, saving time and ensuring accuracy in data entry. AutoFill takes the initial value and replicates it according to the selected pattern, making it a valuable tool for tasks like projecting monthly expenses or managing subscription fees in a spreadsheet.