a ball is thrown into the air with an initial velocity of 25 meters per second. Th function h(t)=-4.9t^2+25t+6 represents the height of the ball above the ground in meters, with respect to time, t, in seconds. What would be a reasonable domain for the function?

Month                 No. of orders in         No. of orders out
January (1)             3                                     1
February (2)           4                                     3
March (3)                5                                      5
April (4)                   6                                      7

Number of orders in = number of month + 2

f(x) = x + 2.

Number of orders out = 2 number of month + 1

g(x) = 2x - 1

So, in words, the numbers of orders in is equal to the number of month plus 1. This represents a linear function, with slope 1 and y-intercept 2. And the numbers of orders out is also a linear function with slope 2 and y-intercpet - 1.