Coefficients
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A single line is a representation of a linear expression shown by the general equation <math>y = ax + b</math>. <math>x</math> and <math>y</math> are the variables (the changing values described above); And <math>a</math> and <math>b</math> are the coefficients. <math>a</math> is a coefficient with an x in its term, this means that when <math>a</math> is changed, it will affect both <math>x</math> and <math>y</math>. In this case, <math>a</math> affects how quickly one changes with respect to the other. When a is one, these two variables change the same amount in comparison to other, therefore the steepness of the line will be a one-to-one ratio. When x is 5 y is 5. When x is -1.672, y is also -1.672. If <math>a</math> is greater than 1, than <math>y</math> is increasing more rapidly than <math>x</math> and the line becomes steeper, (y's value will be greater than its respective <math>x</math> value). If it is less than 1, but greater than zero, <math>x</math> has greater respective values, therefore the line becomes less steep. If <math>a</math> is zero, <math>y</math> is never changing, it remains at a constant value throughout. Therefore, the line is horizontal. To make the line vertical, <math>a</math> would have to be very very large, at infinity. When <math>a</math> is negative, the line will tilt in the other direction. When <math>a</math> is positive the line goes from the bottom left to the upper right, so when it is negative it goes from the bottom right to the upper left. And as it becomes more negative, it will increase the steepness in this direction. | A single line is a representation of a linear expression shown by the general equation <math>y = ax + b</math>. <math>x</math> and <math>y</math> are the variables (the changing values described above); And <math>a</math> and <math>b</math> are the coefficients. <math>a</math> is a coefficient with an x in its term, this means that when <math>a</math> is changed, it will affect both <math>x</math> and <math>y</math>. In this case, <math>a</math> affects how quickly one changes with respect to the other. When a is one, these two variables change the same amount in comparison to other, therefore the steepness of the line will be a one-to-one ratio. When x is 5 y is 5. When x is -1.672, y is also -1.672. If <math>a</math> is greater than 1, than <math>y</math> is increasing more rapidly than <math>x</math> and the line becomes steeper, (y's value will be greater than its respective <math>x</math> value). If it is less than 1, but greater than zero, <math>x</math> has greater respective values, therefore the line becomes less steep. If <math>a</math> is zero, <math>y</math> is never changing, it remains at a constant value throughout. Therefore, the line is horizontal. To make the line vertical, <math>a</math> would have to be very very large, at infinity. When <math>a</math> is negative, the line will tilt in the other direction. When <math>a</math> is positive the line goes from the bottom left to the upper right, so when it is negative it goes from the bottom right to the upper left. And as it becomes more negative, it will increase the steepness in this direction. | ||
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| + | The coefficient <math>b</math> is specifically a constant (a term without variables). Constants affect where the linear function intersects the y-axis (typically the vertical axis). For instance if <math>b</math> is 1, the line will pass through the part of the y-axis where y's value would correlate to 1. As can be inferred, <math>b</math> only changes the y values. It raises or lowers the line by the value it is equal to. | ||
|Field=Algebra | |Field=Algebra | ||
|InProgress=Yes | |InProgress=Yes | ||
}} | }} | ||
Revision as of 15:23, 7 November 2012
| Quadratic |
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Quadratic
- Just a quadratic function.
Basic Description
Every graphical expression has variables, numbers that change dependent upon the location of the point on the graph, and has coefficients and constants, numbers that do not change, but still influence the shape of the graph. The following paragraphs will be examining how these coefficients affect various types of graphical functions.A single line is a representation of a linear expression shown by the general equation 
. 
and 
are the variables (the changing values described above); And 
and 
are the coefficients. is a coefficient with an x in its term, this means that when is changed, it will affect both and . In this case, affects how quickly one changes with respect to the other. When a is one, these two variables change the same amount in comparison to other, therefore the steepness of the line will be a one-to-one ratio. When x is 5 y is 5. When x is -1.672, y is also -1.672. If is greater than 1, than is increasing more rapidly than and the line becomes steeper, (y's value will be greater than its respective value). If it is less than 1, but greater than zero, has greater respective values, therefore the line becomes less steep. If is zero, is never changing, it remains at a constant value throughout. Therefore, the line is horizontal. To make the line vertical, would have to be very very large, at infinity. When is negative, the line will tilt in the other direction. When is positive the line goes from the bottom left to the upper right, so when it is negative it goes from the bottom right to the upper left. And as it becomes more negative, it will increase the steepness in this direction.
The coefficient is specifically a constant (a term without variables). Constants affect where the linear function intersects the y-axis (typically the vertical axis). For instance if is 1, the line will pass through the part of the y-axis where y's value would correlate to 1. As can be inferred, only changes the y values. It raises or lowers the line by the value it is equal to.
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