You add 70 + 50 then you multiply it by 7.5 and you get, 900 gallons.
domain is correct for b and c
the graph is a function because each value of x has only one y value
hence answer is B
To find a slope we have to use this equation:
(y2 - y1 )/(x2 - x1)
and we have two x's and y's
so we will put them in their places....so (1-(-5))/(4-2)
and we will get 6/2 which is 3
Its A.3
.............