Transcript 01 Guess Check and Refine

Stage 5
Year 9
Guess, Check
and Refine.
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Guess, Check and Refine
What is the simultaneous solution below?
Try x=0
Try x=1
Try x=2
y = 2x + 1
y = 3x - 1
Y=2x0+1
Y=1
Y=2x1+1
Y=3
Y=3x0-1
Y = -1
Y=3x1-1
Y=2
Y=2x2+1
Y=5
Y=3x2-1
Y=5
Solution = (2,5)
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Guess, Check and Refine
What is the simultaneous solution below?
y = x + 2
Try x=1
Try x=2
Try x=3
Y=
Y=
Y=
Y=
y = 2x - 1
1+2
3
2+2
4
Y=2x1-1
Y=1
Y=2x2-1
Y=3
Y= 3+2
Y= 5
Y=2x3-1
Y=5
Solution = (2,5)
There is a better way.
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