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# Unit 4 Vocabulary

### why do i only need to know 2 words...? ;-;

TermDefinition
Proportional Relationship A relationship between two equal ratios
Constant of Proportionality The ratio between two directly proportional quantities (Ex. Buying a pack of two for \$3, and finding out how much one would cost, which is \$1.50. \$1.50 and \$1.50 are directly proportional)
Conversions A change in the form of measurement, without changing of the amount being measured.
The Slope Intercept Form of a Linear Function When finding a line on a graph by solving the equation "y=mx+b" (m is equal to the slope and b is equal to the y-intercept) The line passes through the origin
Nonproprtional Linear Relationships When solving for a line on a graph (y=mx+b) and b (the y-intercept) is not equal to zero. The line doesn't pass through the origin
Negative Slope A slope where x is negative and y is positive
Positive Slope A slope where x and y are positive
Slope and y-intercept The slope of a line is its steepness, or slant (y=Mx+b) The y-intercept is the point of the y-axis where the line passes through. (y=mx+B)
Vertical Line A line on the graph that goes straight up and down. X doesn't change
Horizontal Line A line of the graph that goes straight across. Y doesn't change
Absolute Value Function A function that contains an algebraic expression within absolute value symbols.
Step Function a function that increases or decreases abruptly from one constant value to another
Graphing Equations and Inequalities Using y=mx+b to find where a line lays on a graph.
Sequence a string of numbers that follow a particular pattern
Arithmetic Sequences A sequence of numbers such that the difference between the consecutive term is constant