Let the calories given by Samosa be 'x' and that by French fires be 'y'.
So, the equation would be
Calories given by Samosa = ½Calories
given by French fries
x = ½y
Or 2x = y
We need minimum two points to plot a graph.
If x=2 ; y = 1
Coordinates of point A (2,1)
If x= 4 ; y = 2
Coordinates of Point B (4,2)
Join these points.It will give you a graph of this equation.