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Question 28477: Graph Point Reflected across the Axis

On this page
  1. Original question and givens
  2. Definition and scope
  3. Step-by-step derivation
  4. Reverse checks
  5. Result
  6. This question review and source binding

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R0055-28477 · q-20261005-advance-20261006-r02-quadratic-function-0077

Original question and givens

On the full real domain, let q:R→R be q(x)=(-2)(x−(-11))²+(-9), with a≠0. Reflect the graph point (-13,q(-13)) across x=-11. Give the reflected (input,output) pair.

  • G001 — On the full real domain, let q:R→R be q(x)=(-2)(x−(-11))²+(-9), with a≠0. Reflect the graph point (-13,q(-13)) across x=-11. Give the reflected (input,output) pair.

Definition and scope

Use the original question domain, assumptions and cited MKO definitions. This item has second-context mathematical and bilingual review, with the model, answer and every arithmetic step independently recomputed from the original parameters; the source question remains a candidate.

Step-by-step derivation

S001 · implies

Before

source roles = [qf-quadratic-function-axis-mirror, quadratic_mirror]

After

derived = [[reflected_input_unchanged_output_graph_POINT]]

Conditions: none

List this scalar/label/set/point answer role or mode-specific ordered fields,not an imposed universal tuple.Retain legacy domain/underscore operation and integer fractions with/1;original bilingual snapshots stay unchanged.

Step identifiers and dependencies

Rule: source_answer_roles_or_ordered_fields_without_JS · Uses: G001

S002 · calculation

Before

Legacy mirror ORIGINAL x minus h := sub(-13, -11)

After

Legacy mirror ORIGINAL x minus h = -2

Conditions: none

Substitute original roles exactly,without floating approximation or changed operands;extra teaching identities add no source-domain restrictions.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S001

S003 · calculation

Before

Legacy mirror ORIGINAL squared displacement := mul(-2, -2)

After

Legacy mirror ORIGINAL squared displacement = 4

Conditions: none

Substitute original roles exactly,without floating approximation or changed operands;extra teaching identities add no source-domain restrictions.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S002

S004 · calculation

Before

Legacy mirror ORIGINAL a times displacement square := mul(-2, 4)

After

Legacy mirror ORIGINAL a times displacement square = -8

Conditions: none

Substitute original roles exactly,without floating approximation or changed operands;extra teaching identities add no source-domain restrictions.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S003

S005 · calculation

Before

Legacy mirror ORIGINAL graph output plus k := sum(-8, -9)

After

Legacy mirror ORIGINAL graph output plus k = -17

Conditions: none

Substitute original roles exactly,without floating approximation or changed operands;extra teaching identities add no source-domain restrictions.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S004

S006 · calculation

Before

Legacy mirror ORIGINAL twice h := mul(2, -11)

After

Legacy mirror ORIGINAL twice h = -22

Conditions: none

Substitute original roles exactly,without floating approximation or changed operands;extra teaching identities add no source-domain restrictions.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S005

S007 · calculation

Before

Legacy mirror ORIGINAL reflected input := sub(-22, -13)

After

Legacy mirror ORIGINAL reflected input = -9

Conditions: none

Substitute original roles exactly,without floating approximation or changed operands;extra teaching identities add no source-domain restrictions.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S006

S008 · calculation

Before

Legacy mirror reflected displacement := sub(-9, -11)

After

Legacy mirror reflected displacement = 2

Conditions: none

Substitute original roles exactly,without floating approximation or changed operands;extra teaching identities add no source-domain restrictions.

Step identifiers and dependencies

Rule: exact_rational_arithmetic · Uses: G001, S007

S009 · implies

Before

source roles = [-2, -11, -9, -13, -9]

After

derived = [-2, 2, -17, 2h-(2h-x)=x]

Conditions: none

x_prime=2h-x gives x_prime-h=-(x-h),so the square and q value are unchanged.Return the FULL graph point,not the axis or vertex.A point at x=h reflects to itself;derived coordinates/values are not SAFE-clipped.

Step identifiers and dependencies

Rule: Legacy_mirror_FULLreal_vertex_quadratic_involution_unchanged_output · Uses: G001, S008

Reverse checks

  • S009 · premise_and_result_audit — Reverse-check complete original data,operands and premises;finite checks,conditional reasoning,formal proof and publication authority remain distinct.
  • S008 · premise_and_result_audit — Recompute Legacy mirror reflected displacement with exact rational arithmetic, not rounded decimals.
  • S007 · premise_and_result_audit — Recompute Legacy mirror ORIGINAL reflected input with exact rational arithmetic, not rounded decimals.
  • S006 · premise_and_result_audit — Recompute Legacy mirror ORIGINAL twice h with exact rational arithmetic, not rounded decimals.
  • S005 · premise_and_result_audit — Recompute Legacy mirror ORIGINAL graph output plus k with exact rational arithmetic, not rounded decimals.
  • S004 · premise_and_result_audit — Recompute Legacy mirror ORIGINAL a times displacement square with exact rational arithmetic, not rounded decimals.
  • S003 · premise_and_result_audit — Recompute Legacy mirror ORIGINAL squared displacement with exact rational arithmetic, not rounded decimals.
  • S002 · premise_and_result_audit — Recompute Legacy mirror ORIGINAL x minus h with exact rational arithmetic, not rounded decimals.
  • S001 · premise_and_result_audit — Reverse-check complete original data,operands and premises;finite checks,conditional reasoning,formal proof and publication authority remain distinct.

Result

(-9, -17)

The full substitutions and premise checks give the original answer; source identity,format and status are unchanged.

This question review and source binding

Review date: 2026-10-26

Original questions, answers, step expressions, numeric ASTs and historical records are retained. Source candidate labels remain historical and are not overwritten as formal proof.

Source hashes and review receipts
  • input commit: 0f7be61e2c22317a4075561dc822c87d881a50db
  • original question SHA-256: 9f62accae40522016f7781faae9ed3f5e11ad8c6cac30f636cfbe4e81074607d
  • candidate record SHA-256: 3f5dbc3d2c4e49c623f0c7a948e49cca09de41ac06166f0106562d5ce818f200
  • semantic review receipt SHA-256: 6af367dae24a584f3596525c4953bbc2115343efd68cc9083693eb5c1ef2e683
  • question-first witness SHA-256: 611eb69f3716404b968296a8b0d7d8c61b5ca18129d406f1ff9c7c11e10ffb4e
  • Lean: NOT_RUN · human review: NOT_PERFORMED
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