Looking at the graph
The solution is the shaded area below the solid line
so
The inequality is of the form

so
Find out the equation of the solid line
we have the points
(0,0.2) and (3,2.2)
Find out the slope
m=(2.2-0.2)/(3-0)
m=2/3
the equation of the solid line is

therefore
The inequality is equal to

Remember that
0.2=1/5
so
