Which co-ordinates do you plot to draw the graph of x + 2y = 3?

Just subisute values that will work

one easy way is to make one sides equal to only one of the placeholders, like y, and then lug in values in for x exg

x+2y=3

subtract x from both sides

2y=3-x

divideb bith sides by 2

y=-1/2x+3

subsitute valudes for x and get values for y

if x=2 then

y=-1/2 (2) + 3

y==-1+3

y=2

when x=2, y=2

when y=0 then y=3