Final answer:
Using dollar signs ($) in the address $B$2:$B$10 in Excel creates an absolute cell reference that won't change when the formula is copied to other cells.
Step-by-step explanation:
When dollar signs ($) are entered in the address $B$2:$B$10 in Excel, it is used to indicate a range of cells in a formula called a 'cell reference.' The dollar signs are used to make the column letter and row number in the address 'absolute,' meaning they won't change when the formula is copied to other cells. This can be useful when you want to refer to a specific range of cells in a formula and prevent them from adjusting relative to the copied formula.
For example, if you have a formula that calculates the sum of the values in cells $B$2:$B$10, and you copy that formula to another cell, the dollar signs will keep the reference to column B and rows 2 to 10 constant, so the formula will always refer to that specific range.
In summary, by using dollar signs in an address like $B$2:$B$10, you are creating an absolute cell reference that will not change when the formula is copied to other cells.