20k+b=360
25k+b=2 10
Solve the equation, k=-30 and b=960.
Therefore, y=-30x+960.
(2): As mentioned above, the profit of each kite is (x- 16) yuan, and the monthly sales volume is (-30x+960). The monthly profit is:
(x- 16)(-30x+960)
=-30x? +960x+480x- 15360
=-30x? + 1440x- 15360
=-30(x? -48x)- 15360
=-30(x? -48x+24? )- 15360+30×24?
=-30(x-24)? + 1920
When x=24, there is a maximum monthly profit, and the maximum monthly profit is 1920 yuan.
When each Facebook kite is priced as 24 yuan, it can get the maximum profit every month, and the maximum profit every month is 1920 yuan.