Which key should be pressed to edit a selected chart in Excel? MCQ with Answer and Explanation

Explanation:
Double-clicking the top margin or the header area activates the header/footer. There is no single keyboard shortcut; Alt+H,H opens the Header/Footer gallery, but double-click is most direct. However, the question may expect 'Insert > Header & Footer' but that's not a shortcut. I'll choose the most common method: double-click.

Explanation:
CORREL and PEARSON compute correlation coefficient, and COVARIANCE computes covariance. All are related.

Explanation:
Backspace deletes to the left; Delete to the right.