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Mrs. Collazo: Chapter 8 Test Vocab

The vocab on Collazo's test on 2/16.
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Two variable equation
An equation in which the value of one variable is dependent upon the other variable
Abscissa
The x coordinate of an ordered pair
Ordinate
The y coordinate of the ordered pair
Linear Equation
An equation that can be put in standard form (Ax+By=C) and A, B, and C are integers,
Slope
The measure of the steepness of a line
Standard form
Ax+By=C
Point Slope Form
y-y₁=m(x-x₁)
Relation
a set of ordered pairs
Domain
the set of first (x) coordinates of a relation
Range
The set of second (y) coordinates of a relation
Function
A relation in which different ordered pairs have different first (x) coordinates
Direct Variation
an equation in the form of y=kx and where k is a non-zero constant
Inverse Variation
y=k/x or xy=k and x is not equal to 0
k (in terms of direct variation)
- called constant of variation
- called constant of proportionality
k (in terms of inverse variation)
called constant of variation
Slope Formula
m = (y2 - y1) / (x2 - x1)
x-axis
The horizontal number line in the coordinate plane
y-axis
The vertical number lone in the coordinate plane
Quadrant
The four sections the x,y axes divided the coordinate plane into