The sum of eight times a number and fifteen is seven find the number

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

Me asap! what is the slope of this line? enter your answer in the box.

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.