Firstly, let us proceed to plot the graph of f(x) and g(x).
From the graph;
f(x)=x (green line)
g(x)=8/9 x (Blue)
The relationship they have is that they both starts from the origin (0,0).
Also, They both have a positive but not the same slope.
f(x) slope = 1
g(x) slope = 8/9
