natasharamsden2206 natasharamsden2206
  • 04-02-2020
  • Mathematics
contestada

work out the equation of the line which has a gradient of -2 and passes through the point (1,7)

Respuesta :

bayosanuade
bayosanuade bayosanuade
  • 04-02-2020

Answer: [tex]y = -2x + 9[/tex]

Step-by-step explanation:

The formula for finding equation of line given slope and one point is given as :

[tex]y - y_{1} = m ( x - x_{1} )[/tex]

[tex]x_{1}[/tex] = 1

[tex]y_{1}[/tex] = 7

[tex]m = -2[/tex]

substituting the values into the equation , we have :

[tex]y - 7 = -2 ( x - 1 )[/tex]

[tex]y - 7 = -2x +2[/tex]

[tex]y = -2x + 2 + 7[/tex]

[tex]y = -2x + 9[/tex]

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