first we calculate line that represents the equation Y = 0.2X
The slope of the line is 0.2 or (1/5) and the begining of the line is the begining of the two axis (0,0)
So if we draw a line with the above details, we draw the line that represents the line that shows that
(1/5)30=6 The variable is the X and when we give to X the value 30 we get the result which is the Y=6