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.