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Please help explanation if possible

Please help explanation if possible-example-1

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Explanation:

  1. if we multiply gradient of the perpendicular line we are suppose to get -1
  2. the gradient of y=-x-2 is -1(gradient is the coefficient of x)
  3. therefore the gradient of other line is 1
  4. y =mx+c
  5. 10=-5 +c
  6. c=15
  7. therefor the equation of the line is y=x+15
User Mohsen Afshin
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