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Algebra Foundations

You will sink the enemy ships in the coordinate plane by using the slope of the line.

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After completing this tutorial, you will be able to complete the following:

- Calculate the slope of a line.
- Locate points on a line given the slope.

This Activity Object provides practice calculating the slope of a line found on a coordinate plane.

In order to find the slope of a line, it is helpful to first find the vertical change in y (sometimes called the "rise") and the horizontal change in x (sometimes called the "run").

For example,

Note: This line has a positive slope - it slants upward from left to right.

Locate two points on a given line: (0, 1) and (3, 4).

Find the vertical and horizontal change:

The following key vocabulary terms will be used throughout this Activity Object:

· coordinate plane - a plane formed by the intersection of a horizontal number line (the x-axis) and a vertical number line (the y-axis) at their zero points (the origin)

· line - a straight path that is endless in both directions

· slope - the measure of steepness of a line

A slope can be:

o positive - slanting upward, from left to right

o negative - slanting downward, from left to right

o zero - if the line is a horizontal line

o undefined - if the line is vertical, it has no slope

Approximate Time | 20 Minutes |

Pre-requisite Concepts | Students should be familiar with calculating slope, coordinate planes, and locating points on coordinate plane. |

Course | Algebra Foundations |

Type of Tutorial | Skills Application |

Key Vocabulary | coordinate plane, line, slope |