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Mathematics · unit version 1

Precalculus extensions: motion, matrices and transitions

Connect component graphs to paths, reconstruct matrix actions, and distinguish possible from impossible transition histories. These college-preparation extensions are outside AP Precalculus examination weighting.

Open any lesson. Completion records participation; automatic practice checks and human judgment of written arguments are separate. This unit retains its own versioned requirements.

Readiness and preparation

Check your starting point

Try these short questions on paper, then compare your reasoning. They are optional self-checks, not a placement score or a navigation requirement. Use a targeted review when useful and return with your browser’s Back control.

What does a pair of component rules describe?

Both coordinates must use the same parameter value and its stated interval.

Compare reasoning and find a refresher

For x=t² and y=t on 0≤t≤2, the point at t=1 is (1,1). Eliminating t gives x=y² with 0≤y≤2; the unrestricted parabola includes points the path never reaches.

Review parametric paths and their restrictions

How do matrix columns encode a linear action?

Image construction and reconstruction use the chosen vector convention.

Compare reasoning and find a refresher

For column vectors, the first and second columns are the images of (1,0) and (0,1). Multiplication combines those images using the input coordinates; AB applies B first, then A.

Review matrix products and basis images

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Motion, transformation and transition evidence

The mixed assessment has separate response history and review criteria; it does not change lesson participation records.

Lesson sequence

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  1. Parametric components and average motion

    Lesson details and objectives

    Coordinate a spatial path with two time graphs, interpret average displacement and prove the reached branch.

    • Read simultaneous positions and component extrema from coordinated graphs with their distinct axes.
    • Calculate average component changes with units and distinguish finite, vertical and coincident-endpoint secants.
    • Prove both directions of a restricted Cartesian description and compare traversal order without differentiation.
    • Parametrize both hyperbola branches with domain checks and interpret a supplied variable velocity independently of position.

    9 practice tasks.

  2. Matrix actions and reconstruction

    Lesson details and objectives

    Build point-set images, recover basis actions and distinguish an inverse from lost information.

    • Construct a transformed polygon and verify coordinates with row arithmetic.
    • Recover a column-vector linear map from basis images and compare both composition orders.
    • Classify unique, impossible and nonunique reconstruction and interpret determinant sign separately from area.

    6 practice tasks.

  3. Forecast state proportions and test a past-state reconstruction

    Lesson details and objectives

    Construct conditional transition rows, inspect exact multiple-step forecasts and distinguish feasible, impossible and nonunique backcasts.

    • Construct a row-stochastic two-state model and calculate a bounded multi-step forecast.
    • Verify a reconstructed prior distribution using both forward substitution and probability feasibility.
    • Separate stationarity, convergence and individual paths while stating model assumptions.

    6 practice tasks.