On the 'Regional Sales' worksheet, in cells D4:F7, use the Fill Series feature to complete the sales projections using a linear growth rate of 500,000 per year.

Question

Explanation

Fill Series for Linear Sales Projections

Overall Goal

You need to populate a range of cells (D4:F7) with projected sales values that increase by exactly 500,000 each year. The Fill Series feature automates this - it's more reliable than manually typing values because it enforces a mathematically consistent progression and eliminates human error.

Why Fill Series (Not AutoFill)?

AutoFill with a single starting value just copies the value. AutoFill with two values infers the step, which is error-prone. Fill Series lets you explicitly define the step value (500,000) and type (Linear), giving you precise control.

Step-by-Step Breakdown

1. Navigate to the 'Regional Sales' worksheet You must be on the correct sheet - Excel operates on the active sheet, so working on the wrong sheet silently corrupts the wrong data.

2. Select the range D4:F7 You must select the entire target range before invoking Fill Series. The selection tells Excel both where the seed values are (the first row or column) and where to fill. If you skip this, Excel won't know the bounds and will either fill too little or prompt you ambiguously.

3. Go to Home → Editing → Fill → Series This opens the Series dialog. Using this dialog (vs. drag-fill) is essential when you need to specify an exact step value - drag-fill doesn't let you type 500,000 precisely.

4. In the Series dialog:

• Series in: Columns - This tells Excel the growth direction is down each column (each row = a new year). Choosing Rows would fill across columns instead, producing wrong results.
• Type: Linear - Linear adds the step value each period (500,000, 1,000,000, 1,500,000…). Growth would multiply instead, which is wrong here.
• Step value: 500,000 - This is the fixed annual increment. If omitted or wrong, the projections are mathematically incorrect.
• Click OK

If you skip the Step value, Excel defaults to 1, producing meaningless projections. If you choose Growth instead of Linear, the values compound multiplicatively, which overstates growth dramatically.

What Goes Wrong If Steps Are Out of Order

If you open Fill Series before selecting D4:F7, the dialog has no context for the destination range and the fill won't cover the right cells. Always select first, fill second.

Memory Tip

"Select, then Serialize" - Select your range, then define the Series rules. Think of it like addressing an envelope before writing the letter: destination first, content second.

The key numbers to remember: the range D4:F7 is your envelope, Linear + 500,000 is your message.

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