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23-04-2018
Mathematics

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which of the following equations describes the line shown

which of the following equations describes the line shown class=

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Aishani Aishani

23-04-2018

(-4,4) (2,1)
gradient = (1-4)/(2--4) = -1/2
y = mx + c
y = -1/2x + c
Replace point (2,1) in the equation
1=-1/2(2) +c
c = 2
Equation : y = -1/2x + 2
y-2 = -1/2x
Answer is C.
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