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Question

If f={(1,1),(2,3),(0,−1),(−1,−3)} be a linear function z to z, find f(x).

A
2x+1
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B
2x1
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C
3x+2
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D
3x1
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Solution

The correct option is D 2x1
If f={(1,1),(2,3),(0,1),(1,3)} be a linear function z to z.

By two points (1,1) & (2,3) we can draw a linear equation.

(y1)=3121(x1)

y1=21(x1)

y1=2x2

y+21=2x

y2x+1=0

y=2x1

Hence linear function will be f(x)=2x1.

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