Lawson Advertising Agency is trying to persuade Kansas City Sailboards Company to spend more on advertising. The agency's argument is that a constant and strong positive relationship exists between advertising and sales in the sailboard industry. Sue Lawson presents these data taken from industry data for stores similar in size and market share to Kansas City Sailboards: Advertising Expense Annual Sales $ 2,500 $ 96,000 3,000 110,000 3,500 124,000 4,000 138,000 4,500 143,000 5,000 147,000 5,500 150,000 Required: 1. Use the high-low method to estimate the relationship between increased advertising and sales. Amount of increased sales for every dollar of advertising $ 18 2. Graph annual sales and advertising expense. (Use the line tool to draw the annual sales and advertising expense. To complete the graph, click annual sales and then click the graph to bring up data coordinates. Enter the exact data coordinates for each activity level.) Annual Sales $ Annual Sales 180000 160000 140000 Tools (5400 163000) Annual Sales