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26-06-2017
Mathematics

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What is the equation of this line? (-1,7) (2,-2)

Respuesta :

26-06-2017

Gradient= (y2-y1)÷(x2-x1)
= (-2-7)÷(2+1)
= -3

Subt the gradient into one coordinate point (2,-2)
Let 2 be x, -2 be y

Equation of line = y=mx+c
-2= -3(2) + C
therfore C is 4.

Equation of line is y=-3x+4

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