What is the slope of the line shown below?

Given the graph below state whether or not the relation is a function, and give the domain and range.

On a piece of paper graph f(x)=5•(0.4)^x

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π