Answer:
% of a weeks visitor come to the website on an average day
Step-by-step explanation:
Visitors on the website per day 
Visitor on the website in seven day 
Percent of visitor on any average to the total visitors in a week

So you should go to a y-intercept calculater nd find the 2 pints put them in and that will be your answer.
You need the graph in order to solve it
2x is not a way to express this. You could use 2 + x or x +2. But 2x is x multiplied by 2. x + 2 is x plus 2.