Water flows through a cylindrical pipe of varying cross-section. The velocity is 3.0 m/s at a point where the pipe diameter is 1.0 cm. What is the flow rate R

The flow rate is  

Explanation:

From the question we are told that

    The velocity is

   The  diameter of the pipe is  

The  radius of the pipe is mathematically represented as

substituting values

The flow rate is mathematically represented as

Where is the cross-sectional area of the pipe which is mathematically evaluated as

substituting values

So

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6