curl --request POST \
  --url https://api.iotools.cloud/v1/tool/parallel-and-perpendicular-line-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "x": "1",
  "y": "3",
  "slope": "2"
}
'

{
  "tool": "parallel-and-perpendicular-line-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "parallelSlope": "2",
    "parallelYIntercept": "1",
    "parallelSlopeIntercept": "y = 2x + 1",
    "parallelStandardForm": "2x - y = -1",
    "perpendicularSlope": "-0.5",
    "perpendicularYIntercept": "3.5",
    "perpendicularSlopeIntercept": "y = -0.5x + 3.5",
    "perpendicularStandardForm": "0.5x + y = 3.5",
    "steps": "Point: (x, y) = (1, 3), reference slope m = 2\nParallel line: same slope as the reference line, m = 2\n  b = y − m·x = 3 − (2)(1) = 1\n  y = 2x + 1  (standard form: 2x - y = -1)\nPerpendicular line: slope = −1/m = −1/2 = -0.5\n  b = y − m_perp·x = 3 − (-0.5)(1) = 3.5\n  y = -0.5x + 3.5  (standard form: 0.5x + y = 3.5)"
  },
  "credits_used": 5,
  "credits_remaining": null
}