Algebra 11 Vocab 2

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X-axis
The principal or horizontal axis of a system of coordinates, points along which have a value of zero for all other coordinates
Y-axis
the secondary or vertical axis of a system of coordinates, points along which have a value of zero for all other coordinates.
Coordinate plane
The plane determined by a horizontal number line, called the x-axis, and a vertical number line, called the y-axis, intersecting at a point called the origin
Ordered pair
a pair of elements a, b having the property that ( a, b) = (u, v ) if and only if a = u, b = v.
Linear function
A function that can be written in the form of f(x)=mx+b, where x is the independent variable and m and b are real numbers. It's graph is a line.
Parallel lines
Have same slope. Never touch
Standard form of a line
Ax+By=C, where A,B, and C are real numbers
Perpendicular lines
Have opposite reciprocal slopes and intersect at a right angle
Slope-intercept form
y=mx+b, where m is the slope and b is the y-intercept
Point slope form
y-y1=m(x-x1), where m is the slope and (x1, y1) is a point on the line
Quadrant
each of four parts of a plane, sphere, space, or body divided by two lines or planes at right angles
Domain
The set of all possible input values of a relation or function (x values)
Range
The set of output values of a function (y values)
Y-intercept
The y-coordinates of the points where a graph intersects the y-axis
X-intercept
The x-coordinates of the points where a graph intersects the x-axis
Correlation
A measure of the strength and direction of the relationship between two variables or data sets
Regression
The statistical study of the relationship between variables
Correlation coefficient
A number r, where -1<r<1, that describes how closely the points Ina scatter plot cluster around the least-squares line
Line of best fit
The lines that comes closest to all of the points in the data set
Slope
A measure of the steepness of a line. If (X1,y1) and (x2,y2) are any two points in the line, the slope of the line, known as m, is represented by the equation m=y2-y1/x2-x1
Origin
The intersection of the x- and y-axes in a coordinate plane. The coordinates or the origin are (0,0)
Boundary line
A line that divides a coordinate plane into two half-planes
Scatter plot
A graph with points plotted to show a possible relationship between two sets of data