From the origin you have to go 3 right put a dot and seven down put a dot, 13 down and one right ? Not sure
Domain: -∞ ≥ x ≥ ∞
Range: y ≥ 0
This graph shows a function
For downstairs- 28 x 38= 1064
For upstairs- 26 x 14= 364
All together- 1064 + 364= 1428
So.... 1428 seats in total.
Hope this helped! :)