Answer:
B. Linear decreasing
Explanation:
We are given that,
The graph of the function is passing through the points (0,3) and (1.5,0).
Then, the rate of change is

So, the function is represented by a straight line with constant rate of change -2.
Thus, the function is a linear function.
Moreover, as the value of x is increasing, we see that the value of y is decreasing.
So, the function is a decreasing function.
Hence, option B is correct.