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Please answer the question on the image attached

Please answer the question on the image attached-example-1
User Dvlsg
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Y= -2+21
This is because the slope needs to be the negative reciprocal of 1/2 so the slope is -2 then you take the point (5,11) and plug that an the -2 into y=m(x)+b and you solve for b. In the end you get 21
User Lahiru Ashan
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