That is y=-2x+2250,
The range of independent variable x is 0≤x≤450, and x is an integer;
(2) From the meaning of the question, 20x+30(450-x)≤ 10000,
The solution is x≥350,
350≤x≤450 from ( 1)，
∵y decreases with the increase of x,
When x=350, the maximum value of y is -2× 350+2250 = 1550,
∴450-350= 100.
A: Enterprises should produce 350 sheep dolls and 100 wolf dolls every day if they want to make the most profits every day.