Algebra 1 Topic 3 Vocabulary

negative correlation

a relationship between two variables in which one variable increases when the other decreases

positive correlation

a relationship between two variables in which both variables either increase or decrease together

trend line

a line on a scatter plot that helps show the correlation between data sets more clearly

causation

A cause and effect relationship in which one variable controls the changes in another variable.

correlation coefficient

a statistical index of the relationship between two things (from -1 to +1)

extrapolation

estimating a value outside the range of measured data

interpolation

estimating a value within the range of measured data

line of best fit

the most accurate trend line on a scatter plot showing the relationship between two sets of data

linear regression

defines a line of best fit for correlational data that can be used as a prediction equation

bivariate data set

consists of observations on two variables made on individuals in a sample or population

continuous

domain includes all real numbers

discrete

domain consists of just whole numbers or integers

domain

the set of inputs

function

an input-output relationship that has exactly one output for each input

one-to-one

a relationship wherein each point in a set of points is mapped to exactly one other point

range

the set of outputs

relation

a set of ordered pairs

function notation

the notation used to describe a function

linear function

a function whose graph is a line