This learning object is a Java applet in which the student is given the equation y = mx + b. The program first asks the student to move the line to the correct y-intercept and then rotate for the correct slope.
Type of Material:
This is an interactive Java applet.
This applet should be used as re-enforcement for graphing linear equations in the slope-intercept form of a line.
A JAVA 2 plug-in is required.
Identify Major Learning Goals:
This student using this applet will learn to graph a line using the slope-intercept form.
Target Student Population:
Beginning and Intermediate Algebra students
Prerequisite Knowledge or Skills:
The student should know what m and b represent in the slope-intercept form of a line and should know what is meant by rise over run when referring to slope.
To graph the line, a very simple and logical process must be followed every time: move the line to the y-intercept and then drag the line up/down and over in accordance with the given slope. Excellent messages are shown if the user chooses the slope for the y-intercept and vice versa. It also points out errors if the user inverts the slope or forgets the sign on the slope or y-intercept. The student can also ask for a hint which can help them get started.
After numerous equations, an equation with a y-intercept of 0 or a slope of 0 was never given.
Potential Effectiveness as a Teaching Tool
Consistency in presentation of the equation in the form y=mx+b allows a student to develop an understanding of the graphing process. Informative messages are displayed when a student makes an error directing the student how to correct their mistake.
Ease of Use for Both Students and Faculty
Directions very simple because the applet is very simple to use.
Usually when the line was moved very close to but just below a point, the value was accepted but occasionally the position of the line would not be accepted and the user would be given a hint and told to re-graph.
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