x1=10 y1=0
x2=11 y2=2
y2-y1=2-0=2
x3=12 y3=4
y3-y2=4-2=2
x4=13 y4=6
y4-y3=2
x5=14 y5=8
y5-y4=2
equation of a line :
y=2x-20
Proof:
x=10
y=2x-20=2*10-20=20-20=0
x=11
y=2x-20=2*11-20=22-20=2
x=12
y=2x-20=2*12-20=24-20=4
x=13
y=2x-20=2*13-20=26-20=6
x=14
y=2x-20=2*14-20=28-20=8
equation of a line with the co-ordinates(10,0),(11,2),(12,4),(13,6) and (14,8)
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