All normal supply curves have a positive slope that goes up when you read the diagram from left to right. False

False. The statement is incorrect. In economics, a normal supply curve typically has a positive slope, meaning that as the price increases, the quantity supplied also increases. This is because suppliers are generally willing to supply more of a good or service when the price is higher, as it allows them to earn more profit. Therefore, when you read a supply curve from left to right, it generally slopes upwards, indicating that the quantity supplied increases as the price increases.