Roma had guests for dinner eight times and kept track of the number of guests and the cost for the meal. Guests: 3, 4, 4, 6, 6, 7, 8, 8 Cost: 30, 65, 88, 90, 115, 160, 150, 162. 4: Use the data to find a line of best fit. 5: What does the model predict for the cost for 7 guests? 6: Is the predicted cost lower or higher than the actual cost for 7 guests?