itzel2018anguiano itzel2018anguiano
  • 16-12-2020
  • Mathematics
contestada

Points (-2, 4) and (-1, 1) lie on the same line. Which of the following equations represents the line

Respuesta :

abidemiokin
abidemiokin abidemiokin
  • 22-12-2020

Answer:

y = -3x - 2

Step-by-step explanation:

Given the coordinates  (-2, 4) and (-1, 1), we are to find the equation of a line passing through the points.

The standard form of the equation is expressed as;

y = mx+c

m is the slope

m = y2-y1/x2-x1

m = 1-4/-1+2

m = -3/1

m = -3

get the y-intercept c;

Substitute m = -3 and any point say (-1,1) into the equation y = mx+c

1 = -3(-1) + c

1 = 3 + c

c = 1-3

c = -2

Get the required equation;

y = mx+c

y = -3x + (-2)

y = -3x - 2

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