Explanation

In Excel, formulas must begin with an equals sign (=).

Options A, B, and C are all valid formulas.

Option D (C1+15) is not a valid formula because it lacks the = sign.

Explanation

Explanation

The keyboard shortcut to minimize an Excel worksheet is Ctrl+F9.

This shortcut also restores all workbook windows that are maximized. 

Here are some other Excel keyboard shortcuts:

Ctrl+F10: Maximizes or restores the selected workbook window

Ctrl+F7: Moves workbook windows that are not maximized

Ctrl+F8: Performs the size command for workbook windows that are not maximized

Ctrl+P: Opens the print dialog box

Ctrl+Z: Undoes the last action

Alt+Space: Displays the Control menu for the Main Excel window

Alt+F4: Closes Excel

F6/Shift+F6: Moves to the next or previous pane in a workbook that has been split

Ctrl+Tab/Ctrl+Shift +Tab: Moves to the next or previous workbook window

Explanation

In MS Excel, the $ symbol locks the row and/or column in a cell reference (e.g., $A$1).

This is used in formulas to create an absolute reference that does not change when copied.

Explanation

Autosum is a feature in Excel that automatically adds numbers in selected cells.

It uses the SUM function.

It is commonly accessed via the Σ (sigma) icon on the toolbar.

Explanation

Explanation

The Insert tab in MS Excel contains options to create charts, tables, pivot tables, etc.

It allows users to visualize data in various chart formats like bar, pie, line, and more.

Explanation

Sorting means arranging data based on specific criteria such as size, value, or quantity.

These criteria determine the order (ascending or descending) of the data.

Explanation

A Pie Chart is ideal for showing the proportional contribution of each income source to the total income.

It visually displays how a whole is divided into parts, making comparisons easy.

Explanation