The height (sidewalk to roof) of notable tall buildings in America is compared to the number of stories of the building (beginning at street level).

Height (in feet)	Stories
1050	57
428	28
362	26
529	40
790	60
401	22
380	38
1454	110
1127	100
700	46

Based on the least squares line, adding an extra story adds about how many feet to a building? (Round your answer to three decimal places.) ______ ft