23 terms

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