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15 Cards in this Set
- Front
- Back
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Constant of Proportionality |
If a quantity x is proportional directly to another quantity y, this x is written as x=KY |
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Constant of variation |
the number that relates two variables that are directly proportional or inversely proportional to one another. |
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constant rate of change |
The (constant) rate of change with respect to the variable x of a linear function y = f(x) is the slope of its graph. If x and f have units inDefinition 2, then the units of the rate of change are those of f divided by those of x. |
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Direct variation |
A relationship between two variables in which one is a constant multiple of the other. In particular, when one variable changes the other changes in proportion to the first. If b is directly proportional to a, the equation is of the form b = ka (where k is a constant). |
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Linear relationships |
a statistical term used to describe the relationship between a variable and a constant |
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Point-slop form |
the equation of a straight line in the form y − y1 = m(x − x1) where m is the slope of the line and (x1, y1) are the coordinates of a given pointon the line |
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move from a lower to a higher position, move upward; increase in number or amount |
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Run |
How far a line goes. |
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Slope |
slant mean to incline away from a relatively straight surface or line used as a reference. |
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Slope-intercept form |
The slope-intercept form is simply the way of writing the equation of a line so that the slope (steepness) and y-intercept (where the line crosses the vertical y-axis) are immediately apparent |
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Standard form |
written down in the way most commonly accepted" It depends on the subject |
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Substitution |
The substitution method is used to eliminate one of the variables by replacement when solving a system of equations |
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Systems of equations |
A "system" of equations is a set or collection ofequations that you deal with all together at once. Linearequations (ones that graph as straight lines) are simpler than non-linear equations, and the simplest linear system is one with two equations and two variables. |
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x-intercept |
the x-coordinate of a point where a line, curve, or surface intersects the x-axis. |
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Y-intercept |
In the equation of a straight line (when the equation is written as "y = mx + b"), the slope is the number "m" that is multiplied on the x, and "b" is the y-intercept, where the line crosses the y-axis |
