Course 3 Unit 3 Vocabulary

The ratio (y/x) between two proportional quantities.

• constant of proportionality

• Coefficient

• reciprocal

• direct variation

The set of input values of a function.

• domain

• range

• coefficient

• constant

A relationship between two variables that has one output value for each input value.

• function

• correlation

• constant of proportionality

• direct variation

A function whose graph is a line.

• linear function

• quadratic function

• exponential function

• piece-wise function

A type of function that has a constant unit rate and, when graphed, passes through the origin.

• proportional relationship

• linear function

• quadratic function

• inverse variation

The set containing all possible output values of a function.

• range

• domain

• solution set

• coefficient

The ratio of the vertical change to the horizontal change in a linear graph.

• slope

• y-intercept

• origin

• vertical line test

A test used to determine if a graph represents a function by checking to see if a vertical line passes through no more than one point of the graph of a relation.

• vertical line test

• horizontal line test

• line must go through the origin at (0,0)

• constant of proportionality