The seasonal index for Menchie's Landscaping services for the summer season was 1.35. Based on this information, what can be concluded about the demand for the landscaping services for the summer season? The seasonal index for Menchie's Landscaping services for the summer season was 1.35. Based on this information, what can be concluded about the demand for the landscaping services for the summer season? The forecast demand for landscaping services for the summer season will be accurate 35% of the time. The demand for landscaping services for the summer season is 35% higher than the average demand during the winter season. The demand for landscaping services for the summer season is 35% lower than the average annual demand. The demand for landscaping services for the summer season is 35% higher than the average demand per season