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  2. Vertical line test - Wikipedia

    en.wikipedia.org/wiki/Vertical_line_test

    In mathematics, the vertical line test is a visual way to determine if a curve is a graph of a function or not. A function can only have one output, y , for each unique input, x . If a vertical line intersects a curve on an xy -plane more than once then for one value of x the curve has more than one value of y , and so, the curve does not ...

  3. File:Vertical-wavy-line-test.svg - Wikipedia

    en.wikipedia.org/wiki/File:Vertical-wavy-line...

    Test of vertical wavy line with specified dimensions. Converted from the following vector PostScript source code: <pre>%! 10 setlinewidth 20 0 moveto 0 30 -10 45 -10 ...

  4. Implicit curve - Wikipedia

    en.wikipedia.org/wiki/Implicit_curve

    In general, implicit curves fail the vertical line test (meaning that some values of x are associated with more than one value of y) and so are not necessarily graphs of functions. However, the implicit function theorem gives conditions under which an implicit curve locally is given by the graph of a function (so in particular it has no self ...

  5. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

  6. Maddox rod - Wikipedia

    en.wikipedia.org/wiki/Maddox_rod

    Maddox rod test tutorial. Method for measuring vertical deviations: 1. The Maddox Rod is held in front of the patient's right eye with the cylinders vertical, making the red line horizontal. 2. The patient is then asked whether the white light is superimposed on the red line or if it appears above or below the red line.

  7. VIT signals - Wikipedia

    en.wikipedia.org/wiki/VIT_signals

    In television broadcasting, VIT signals (vertical interval test signals) are a group of test signals inserted in the composite video signal. These signals are used to weight [1] the transmission characteristics of the system between the test generator and the output of the demodulator, where the system includes the microwave links, or TVROs as well as the TV transmitters and the transposers.