The graph represents the number of bands, n, and the cost of the bands, c. Pick the equation that represents the graph. PLEASE HELP

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

The graph shown below expresses a radical function that can be written in the form f(x)=a(x+k)1/n+c what does the graph tell you about the value of n in this function

Which expression is equivalent to? assume x > 0 and y > 0.