Final answer:
The equation representing the number of cups of sugar (c) needed for (b) batches of cookies, with each batch requiring 2.5 cups, is c = 2.5 × b. This multiplication equation helps to calculate the total cups of sugar based on the number of batches to be made.
Step-by-step explanation:
To find the equation that represents the number of cups of sugar (c) needed for a given number of batches of cookies (b), where each batch requires 2.5 cups of sugar, we can use a simple multiplication equation. For each batch, 2.5 cups are required, so for b batches, the total number of cups needed is the product of 2.5 and b. The equation representing this relationship is:
c = 2.5 × b
For example, if someone wants to make 3 batches of cookies, they would need:
c = 2.5 × 3 = 7.5 cups of sugar.