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Fengxian Ermo Mathematics 20 14
(1) let the functional relationship between y and x of team b be y=kx+b in the period of 2≤x≤6.

As can be seen from the figure, the function image passes through points (2, 30), (6, 50),

∴2k+b=306k+b=50,

The solution is k = 5b = 20,

∴y=5x+20;

(2) As can be seen from the figure, the speed of Team A is 60÷6= 10 (m/h).

The length of colored paving bricks laid by Team A from start to finish is Z meters.

According to the meaning of the question, did you get z? 60 10=z? 50 12,

The solution is z= 1 10,

Answer: The length of colored paving bricks laid by Team A from beginning to end is110m.