To find the slope of the line we have to identify two coordinates in the line and use this equation:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
So I use the coordiantes (0,15) and (3,45) so
[tex]\begin{gathered} m=\frac{45-15}{3-0} \\ m=10 \end{gathered}[/tex]
and the y intercept is 15 so the general equation will be:
[tex]y=10x+15[/tex]
