Number of days (x) 2 7 0 4 8 3 6 1 5 Number of photographs uploaded to a social networking site (y) 12 37 2 22 42 17 32 7 27 What does the y-intercept of the model represent? (4 points) The total number of photographs uploaded daily The original number of photographs uploaded to the site The increase in the number of photographs uploaded to the site each day The decrease in the number of photographs uploaded to the site each day