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Tags: Question 22 . When both of them appear, the result is positive. Metamorphopsia -- distorted vision -- is the appearance in the Amsler grid of straight horizontal and vertical lines appear wavy. If any vertical line passes through no more than one point of the graph of a relation, then the relation is a function. If you are using the vertical line test, and your "line" touches the graph in more than one point, then it is not a function. This precalculus video tutorial provides a basic introduction into the vertical line test. SURVEY . Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website! What do two lines on a pregnancy test mean? Again, I popped the test open and the control line on the evening urine test was VERY faint, though still noticeable. A vertical line test is a visual way to determine if the graph of a relation is a function using a vertical line. A frequently asked question by first-timers to pregnancy test is “What do two lines on a pregnancy test mean?” Two pregnancy test lines on a pregnancy test are the control and the test line. Math. Describe how the variables are . Consistent Dependent System. answer choices . Report an issue . Yes. A necessary condition for two lines to intersect is that they are in the same plane—that is, are not skew lines. Link to printable Amsler grid (printed at 300dpi) Test your vision with adequate lighting. What are the variables? Q. You could say, "If any vertical line crosses the graph of a relation at at most one point, the relation is a function." ... Vertical Line Test. If the vertical line passes through at least two points on the graph, then an element in the domain is paired with more than 1 element in the range. I took another test (evening, obviously diluted, almost clear urine) and received another not pregnant. answer choices . 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