Wer the questions, Use the following data set to answer questions 1-3: Sales vs. Number of Customers 2,500 2,000 1,500 Sales (dollars) 1,000 500 0 10 20 30 40 50 60 70 80 90 100 Number of customers 1. Using the above scatterplot, does there seem to be a positive correlation, a negative correlation, or no correlation between the number of customers and sales? 2. Using the above scatterplot, what are the explanatory variable and the response variable? 3. Using the above scatterplot, what is a reasonable prediction for sales when there are 45 customers? ​