##### Ch 4 vocab pg 272

8th grade, 9th grade

Best-fit line

The line that most closely approximates the data in the scatter plot.

Bivariate data

Data with two variables

constant function

A linear function of the form y=b

constraint

a condition that a solution must satisfy

correlation coefficient

A value that shows how close data points are to a line

identity function

the function y=x

inverse function

generated ordered pairs of the inverse relation

inverse relation

the set of ordered pairs obtained by exchanging the x-coordinates with the y-coordinates of each ordered pair in a relation

linear extrapolation

The use of a linear equation to the predict values that are outside the range of data.

linear interpolation

The use of a linear equation to predict values that are inside of the data range

linear regression

An algorithm to find a precise like of fit for a set of data

line of fit

A line that describes the trend of the data in a scatter plot

median-fit line

A type of best-line that is calculated using the medians of the coordinates of the data points

parallel lines

Lines in the same plane that do not intersect and either have the same slope or are vertical lines.

perpendicular lines

Lines that intersect to form a right angle

point-slope form

An equation of the form y-y_{1}=m(x-x_{1}) where m is
the slope and (x_{1,}y_{1}) is the given point on a
nonvertical line.

scatter plot

a scatter plot shows the relationship between a set of data with two bariables, graphed as ordered pairs on a coordinate plane

slope-intercept form

An equation of the form u=mx+b where m is the slope and b is the y-intercept.