Plotting lines on graph paper
Example 1
Plot the graph of y=x
This actually means y=mx+c
y=1x+zero
Graph of y=x
First lets calculate some points on the graph.
x=-2 then y=-2
x=-1 then y=-1
x=0 then y=0
x=1 then y=1
x=2 then y=2
Now draw a graph and mark on the above points
Now draw a straight line through these points
Example 2
Plot the graph of y+x=5
Always put the formula in the form y=mx+c
y=-1x+5
First lets calculate some points on the graph.
x=-2 then y=-1(-2)+5=7
x=-1 then y=-1(-1)+5=6
x=0 then y=-1(0)+5=5
x=1 then y=-1(1)+5=4
x=2 then y=-1(2)+5=3
Now draw a graph and mark on the above points
Now draw a straight line through these points
Example 3
Plot the graph of 2y-3x=7
Always put the formula in the form y=mx+c
2y=3x+7
y=32x+72
y=112x+312
First lets calculate some points on the graph.
x=-2 then y=1.5(-2)+3.5=0.5
x=-1 then y=1.5(-1)+3.5=2
x=0 then y=1.5(0)+3.5=3.5
x=1 then y=1.5(1)+3.5=5
x=2 then y=1.5(2)+3.5=6.5
Now draw a graph and mark on the above points
Now draw a straight line through these points
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