how to graph 20y = 5

So the graph which you mentioned needs to be plotted in this way. Note
that the equation which you have is 20y = 5 which says that y = 520 =
1
4 . And
this is a straight line whose y co-ordinate always is 14 . So mark y =
1
4 on the
y-axis and then draw a straight line which is parallel to...