From the graph, the y-intercept is -70
Hence b = -70
x-intercept is 70
Therefore with the two points (0, -70) and (70, 0), we can find the gradient of the line
m is the gradient.
[tex]m=\frac{-70-0}{0-70}=\frac{-70}{-70}=1[/tex][tex]\begin{gathered} \Rightarrow y=(1)x+(-70) \\ \Rightarrow y=x-70 \\ \end{gathered}[/tex]
Hence the equation of the line is:
y = x - 70
