Answer: C) 7
====================================================
Step-by-step explanation:
Notice how the point to the very far right is an outlier. See the diagram below. The line of best fit in red goes through (or close to) the cluster of points to the left of this outlier location. It's not the best fit ever, but it's close enough. The drawing I did is my best guess. Without knowing the actual numbers, it's impossible to get the actual regression line.
The location of this outlier is (x,y) = (7,4). This means x = 7 and y = 4 pair up together. Since x is the width and x = 7, this means a width of 7 is an outlier.