If the y-value decreases as the x-value increases then you have a negative correlation. Meaning that the line-of-fit has a negative slope.

What is a line-of-fit? Given a data set, plot the ordered pairs on a graph. It looks like a scatter plot. Now estimate, and draw a line that best fits what the data represents. That is your line-of-fit.

Transformations. Learn a little bit of geometry. See how to translate a geometric figure on a coordinate plane vertically by sliding it over. Simply pick a point on the figure and count the units you want to move it. Then repeat that for...

Transformations. Learn a little bit of geometry. See how to translate a geometric figure on a coordinate plane horizontally by sliding it over. Simply pick a point on the figure and count the units you want to move it. Then repeat that...

A reflection is just what you think it is, a mirror image. So how do you reflect a figure on a graph? Just flip it over. The teacher illustrates how to select a line of reflection (the y-axis) and make the calculations to flip the figure.

The teacher illustrates several ways to look at what the range is in a set of numbers. Input, output, stem and plot table, graphs, and diagrams are a few of the ways in which she illustrates the meaning of range.

The coordinate axes are the x-axis, which is the horizontal axis, and the y-axis, which is the vertical axis. Remember, these axes go on forever.

Just a quick diagram and explanation of the parts of the coordinate plane. You might want to remind your class to put arrows on the ends of the x-axis and the y-axis, as these lines go on forever.

In Algebra 1 the concept of relations is studied. As a starting point to this unit, guide your learners to identify algebraic relations and discriminate the domain and range within an ordered pair though this informative video. Assign...

Video explaining the contributions of Rene Decartes to Algebra and Geometry. [11:22]

This video identifies the four quadrants of the coordinate plane and explains how to identify what quadrant an ordered pair would be located in. Practice problems available. [2:24]

This video demonstrates how to identify the ordered pair of a point graphed on the coordinate plane and how to graph a point when given the ordered pair. It also goes a step further and demonstrates how to graph a geometric figure based...

This QuickTime movie provides an explanation of Truth Tables, ordered pairs, and graphing the ordered pairs. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.

This lesson discusses the relationship between positive and negative numbers. It is 1 of 13 in the series titled "Relating Positive and Negative Numbers."

This lesson demonstrates how an object can be rotated in space and on a coordinate plane about different points. It is 4 of 5 in the series titled "Rotating On a Coordinate Plane."

This tutorial introduces planes and shows how to name them. [3:44]

Presents example problems about the location of and the distance between coordinates on a grid. [4:47]

If you graph an inequality on the coordinate plane, you end up creating a boundary that cuts the coordinate plane in half. Each of these halves is called a half-plane. Learn about them by watching this tutorial. [1:18]

This tutorial introduces the distance formula and shows how to find it. [3:01]

Plotting points on the coordinate plane is the foundation of graphing equations. Before students can graph equations, get familiar with the coordinate plane here in this tutorial. [7:17]

Watch this tutorial to see how to translate a figure on a coordinate plane. Specific examples are given to help learn this concept. [3:37]

Learn how to plot a point on a coordinate plane, identify the ordered pair, and figure out which quadrant the point is in. This video shows examples along with hints and tricks. [7:17]

This tutorial introduces ordered pairs and shows why they are a fundamental part of graphing. [2:20]

The coordinate plane has two axes: the horizontal and vertical axes. Learn about these axes and the name for their point of intersection by watching this tutorial. [0:53]