Answer:
The equation is given below as
[tex]\begin{gathered} C=30+0.04n \\ C=0.04n+30 \end{gathered}[/tex]
The general equation of a line is given below as
[tex]\begin{gathered} y=mx+b \\ m=\text{slope} \\ b=\text{vertical intercept} \end{gathered}[/tex]
The graph represents the equation of cost in dollars against minutes
By comparing the coefficient, we will have the slope of the equation to be
[tex]\frac{\text{change in C}}{\text{Change in n}}=\frac{dC}{dn}=0.04[/tex]
Hence,
The slope of the equation is = 0.04
The slope's units is dollars per minute
The vertical intercept of the equation is the point when the value of n=0
[tex]\begin{gathered} C=30+0.04n \\ C=30+0.04(0) \\ C=30 \end{gathered}[/tex]
Hence,
The vertical intercept in this equation = 30
