Читать книгу Statistics (Parameters, Variables, Intervals, Proportions) (Speedy Study Guides) - Speedy Publishing - Страница 3

the equation y = 2x + 3. The range of this function, however, does not include x values below 0 or y values below 3 because the ranges of the original parametric equations do not include these values. So, the graph of these parametric equations actually looks like the graph of y= 2x + 3 cut off below the point (0, 3):

When questions on parametric equations do appear on the test, they’re usually quite simple. Given a parametric equation, you should be able to recognize or sketch the proper graph, whether by plotting a few points or by eliminating the parameter.

Position of a Moving Object