4) Cora plans to buy some calligraphy pens priced at \( \$ 5 \) each. 4)) Write an equation that shows how the total cost, \( y \), depends on the number of calligraphy pens Cora buys, \( x \). (1) Do not include dollar signs in the equation.

The total cost \( y \) can be represented by the equation \( y = 5x \), where \( x \) is the number of calligraphy pens Cora decides to buy. This equation shows a direct relationship between the number of pens and the total amount spent; for every additional pen, Cora spends \( 5 \) more dollars. So, if Cora buys 1 pen, she spends \( 5 \) dollars, and if she buys 4 pens, her total would be \( 20 \) dollars. It’s a simple multiplication that makes budgeting for her new hobby a breeze!