jump to intervals  jump to domain range  jump to practice  jump to links
Unit 2 Terms: Quick definitions of terms available here. To see worked examples of problems about a specific term, click on the specific term from the list below, or from the link in the quick definitions.
x intercepts, y intercepts, zeroes, vertex or turning point, intervals , range ,domain

. 
X intercepts: The points where the graph crosses the x axis. The y coordinate will be zero. 
Y intercepts: The points where the graph crosses the y axis. The x coordinate will be zero 
Back to top


Zeroes: Points on the graph that have y coordinate values of zero. Look at xintercepts. The words are different but zeros and x intercepts are asking for the same points. 
Vertex: The point or points on a graph where the line changes from decreasing (heading down) to increasing (heading up) or viceversa. Another word for vertex is a turning point. 
Back to top


Decreasing intervals are the parts of the graph that go down from left to right. To write up the interval, Use left and right values.Here, (∞, 1) NOTICE IT"S THE X COORDINATE FROM THE VERTEX. 
Increasing intervals are the parts of the graph that go up from left to right. To write up the interval, Use left and right values.Here, (1,∞) NOTICE IT"S THE X COORDINATE FROM THE VERTEX. 
Back to top


Domain is the set of values on the x axis that the function will use. The first value is how far left it goes, and the second value is how for right it goes. Here, ( ∞, ∞). 
Range is the set of values on the y axis that the function will use. The first value is how far down it goes, and the second value is how far up it goes. Here,[2, ∞). NOTICE THE VERTEX VALUE USED IS THE Y COORDINATE. 
Back to top

End Behavior: The left side always starts with "as x→∞", then look at your graph. If the end heads down, add "y→∞ ". If the end heads up, add "y→∞". The right side always starts with "as x→∞", then look at your graph. If the end heads down, add "y→∞ ".If the end heads up, add "y→∞".

Click on play game! to practice maximum,minimum, and x and y intercepts
Click on play game! to practice intervals and range