The graph below plots a function f(x):
graph of line segment going through ordered pairs 0,150 and 3, 0
if x represents time, the average rate of change of the function f(x) in the first three seconds is
answer for blank 1:

Ineed if you could explain and give me the answer you! this needs done

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.