Correlations between Variables

Question 1

Direct proportionality

Answer 1

a mathematical relationship between two variables whose ratio remains constant as their numerical values change (synonymous with positive correlation)

Question 2

Inverse proportionality

Answer 2

a mathematical relationship between variables in which an increase in the value of one causes a decrease in the value of the other (synonymous with negative correlation)

Question 3

No correlation

Answer 3

a lack of relationship between variables on a graph; a change in one value does not affect the other

Question 4

Proportionality constant

Answer 4

a parameter that quantifies the relative changes in variables that are directly or inversely proportional

Question 5

Ratio

Answer 5

a quantity that compares the values of two variables expressed as a fraction

Question 6

Origin of the plot

Answer 6

the point on a graph where the value of both x and y axes are zero

Question 7

Scatterplot

Answer 7

a type of graph comparing two variables as data points in Cartesian, x-y coordinates