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# Why can't you have a point for every value on drawn on a graph?

Updated: 11/22/2022

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Q: Why can't you have a point for every value on drawn on a graph?
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### What is the graph of tangent functio is periodic at?

The graph of the tangent function is periodic at every point. Periodic means that the value of the function at every point is repeated after an integer multiple of the period.

### What is the graph of sine function is periodic at?

The graph of the sine function is periodic at every point. Periodic means that the value of the function at every point is repeated after an integer multiple of the period.

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A point can represent a piece of data or an (x,y) value.

### If all the data values in the class were compiled in a giant histogram and a curve was drawn over the graph where should the highest point on the curve occur?

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A point on a graph, when all nearby points have a smaller value, is called a maximum.

### What is a horizontal line on a graph?

On a 2 dimensional graph, the Y value is the same in each point on a horizontal line. The X value, however, changes. For example, the line Y=7 is an horizontal line; The Y value for every point on the line is 7, yet the X value changes. It is worth pointing out that the line will be straight.

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### What is the zero of a function and how does it relate to the functions graph?

A zero of a function is a point at which the value of the function is zero. If you graph the function, it is a point at which the graph touches the x-axis.

### How do you identify a function graphically?

The normal test for checking that a graph represents a function is to check that it is not one-to-many. That is, one value of x does not get mapped onto more than one value of y. If you can draw any vertical line that intersects the graph at more than one point then it is not a function. If no such line can be drawn then it may be a function. You still have no guarantee that it is.One more requirement of a function is that every point in the domain has an image in the codomain (range).Consider the graph ofy = 2x for 0 < x < 2andy = 2x for 2 < x < 4Is it a function over the domain 0 < x < 4?For every point in the domain there must be a point in the range. It is not possible to check this graphically.In this respect, the question is flawed.

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### What is the corner point of a graph of an absolute value equation?

It is sometimes the point where the value inside the absolute function is zero.