The slope is calculated by picking two coordinate points that lie on the straight line:
[tex]\begin{gathered} slope(m)=\frac{\Delta y}{\Delta x}=\frac{y_2-y_1}{x_2-x_1} \\ (x_1,y_1)=(1,7);(x_2,y_2)=(0,3) \\ slope(m)=\frac{3-7}{0-1}=\frac{-4}{-1}=4 \\ slope(m)=4 \end{gathered}[/tex]
The y-intercept is obtained at the point x = 0 or at the point where the line touches the y-axis. From the graph, the y-intercept is 3
