=-2(x-7/2)？ +77/2

When x changes from 0 to 3, the value of |x-3.5| decreases and the value of y increases.

Therefore, the whole interval in the interval [0,3] is monotonically increasing.

When x=3, y=38 is the maximum.

When x=0, y= 14 is the minimum value.

Range14 < = y <; =38