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18-10-2018
Mathematics

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Which equation is a point-slope form of the equation of this line (-2, 1 ) and (1, 7 )

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18-10-2018

The point-slope formula:

[tex]y-y_1=m(x-x_1)\\\\m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

We have (-2, 1) and (1, 7).

Substitute:

[tex]m=\dfrac{7-1}{1-(-2)}=\dfrac{6}{3}=2[/tex]

[tex]y-1=2(x-(-2))\\\\y-1=2(x+2)[/tex]

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